FDA

上颌第一磨牙的近中颊尖对着下颌第一磨牙颊沟的远中时，此时的称为（）

A:中性 B:远中 C:近中 D:垂直 E:水平

The biggest food safety risk for fresh fruits and vegetables as they are grown, picked or processed comes from human and animal waste, the US Food and Drug Administration (FDA) said Friday.
More than 9,000 Americans die each year from food-borne diseases and some scientists believe fresh produce is the biggest carrier of contamination.
The FDA issued a set of draft guidelines for US and foreign growers to carefully monitor worker hygiene, water quality, manure management and transportation.
This 34-page draft guidelines urged growers to give workers lessons on basic hygiene such as using soap to wash their hands, covering wounds that could come into contact with produce, and using only clean toilets.
The FDA guidelines identified "the major source of contamination" for fresh produce as human or animal feces.
"We think just proper controls and proper attention to detail would make a big difference in food safety, " said an FDA official. "It is our belief that these guidelines would not be very costly. "
But grower groups disagreed with the FDA’s assessment. "Most food-borne disease outbreaks that happen further down the distribution line are due to contamination because people preparing food are not properly washing their hands, " said Stacey Zawal, an official with United Fresh Fruit and Vegetable Association. "That is not necessarily true for growers and packers. "
Some US grower organizations have expressed concern that the agency is interfering with on farm practices. Others object to the FDA’s proposal to have growers formally document the picking, handling and transportation of produce so that health officials could quickly recall foods if necessary.
Consumer groups criticized the FDA guidelines as of little use because they will not carry the force of law. But stricter regulations could evolve as researchers find new technology or methods to kill harmful bacteria or parasites, the FDA said.
The FDA recommendations are due to be made final by the FDA later this year for use by US and foreign growers. The matter of encouraging foreign growers to adopt the guidelines remains somewhat tricky but FDA officials say it is vital because of the huge amount of imported produce.
Some fruit grower groups believe that most food-borne diseases are caused by ______.

A:growers’ lack of attention to personal hygiene B:lack of effective guidelines C:the FDA’s decision to import more foreign fruits and vegetables D:people involved in distributing fresh produce

The biggest food safety risk for fresh fruits and vegetables as they are grown, picked or processed comes from human and animal waste, the US Food and Drug Administration (FDA) said Friday.
More than 9,000 Americans die each year from food-borne diseases and some scientists believe fresh produce is the biggest carrier of contamination.
The FDA issued a set of draft guidelines for US and foreign growers to carefully monitor worker hygiene, water quality, manure management and transportation.
This 34-page draft guidelines urged growers to give workers lessons on basic hygiene such as using soap to wash their hands, covering wounds that could come into contact with produce, and using only clean toilets.
The FDA guidelines identified "the major source of contamination" for fresh produce as human or animal feces.
"We think just proper controls and proper attention to detail would make a big difference in food safety, " said an FDA official. "It is our belief that these guidelines would not be very costly. "
But grower groups disagreed with the FDA’s assessment. "Most food-borne disease outbreaks that happen further down the distribution line are due to contamination because people preparing food are not properly washing their hands, " said Stacey Zawal, an official with United Fresh Fruit and Vegetable Association. "That is not necessarily true for growers and packers. "
Some US grower organizations have expressed concern that the agency is interfering with on farm practices. Others object to the FDA’s proposal to have growers formally document the picking, handling and transportation of produce so that health officials could quickly recall foods if necessary.
Consumer groups criticized the FDA guidelines as of little use because they will not carry the force of law. But stricter regulations could evolve as researchers find new technology or methods to kill harmful bacteria or parasites, the FDA said.
The FDA recommendations are due to be made final by the FDA later this year for use by US and foreign growers. The matter of encouraging foreign growers to adopt the guidelines remains somewhat tricky but FDA officials say it is vital because of the huge amount of imported produce.
An FDA official said that putting the guidelines into practice ______.

A:would be too costly to be effective B:would not cost any money C:would not be very expensive D:would need lots of money

The biggest food safety risk for fresh fruits and vegetables as they are grown, picked or processed comes from human and animal waste, the US Food and Drug Administration (FDA) said Friday.
More than 9,000 Americans die each year from food-borne diseases and some scientists believe fresh produce is the biggest carrier of contamination.
The FDA issued a set of draft guidelines for US and foreign growers to carefully monitor worker hygiene, water quality, manure management and transportation.
This 34-page draft guidelines urged growers to give workers lessons on basic hygiene such as using soap to wash their hands, covering wounds that could come into contact with produce, and using only clean toilets.
The FDA guidelines identified "the major source of contamination" for fresh produce as human or animal feces.
"We think just proper controls and proper attention to detail would make a big difference in food safety, " said an FDA official. "It is our belief that these guidelines would not be very costly. "
But grower groups disagreed with the FDA’s assessment. "Most food-borne disease outbreaks that happen further down the distribution line are due to contamination because people preparing food are not properly washing their hands, " said Stacey Zawal, an official with United Fresh Fruit and Vegetable Association. "That is not necessarily true for growers and packers. "
Some US grower organizations have expressed concern that the agency is interfering with on farm practices. Others object to the FDA’s proposal to have growers formally document the picking, handling and transportation of produce so that health officials could quickly recall foods if necessary.
Consumer groups criticized the FDA guidelines as of little use because they will not carry the force of law. But stricter regulations could evolve as researchers find new technology or methods to kill harmful bacteria or parasites, the FDA said.
The FDA recommendations are due to be made final by the FDA later this year for use by US and foreign growers. The matter of encouraging foreign growers to adopt the guidelines remains somewhat tricky but FDA officials say it is vital because of the huge amount of imported produce.
Consumer groups criticized the FDA guidelines because they didn’t think that these guidelines ______.

A:had won enough support from the growers B:had been written with enough attention to details C:would surely be carried out D:included state-of-the-art technology

The biggest food safety risk for fresh fruits and vegetables as they are grown, picked or processed comes from human and animal waste, the US Food and Drug Administration (FDA) said Friday.
More than 9,000 Americans die each year from food-borne diseases and some scientists believe fresh produce is the biggest carrier of contamination.
The FDA issued a set of draft guidelines for US and foreign growers to carefully monitor worker hygiene, water quality, manure management and transportation.
This 34-page draft guidelines urged growers to give workers lessons on basic hygiene such as using soap to wash their hands, covering wounds that could come into contact with produce, and using only clean toilets.
The FDA guidelines identified "the major source of contamination" for fresh produce as human or animal feces.
"We think just proper controls and proper attention to detail would make a big difference in food safety, " said an FDA official. "It is our belief that these guidelines would not be very costly. "
But grower groups disagreed with the FDA’s assessment. "Most food-borne disease outbreaks that happen further down the distribution line are due to contamination because people preparing food are not properly washing their hands, " said Stacey Zawal, an official with United Fresh Fruit and Vegetable Association. "That is not necessarily true for growers and packers. "
Some US grower organizations have expressed concern that the agency is interfering with on farm practices. Others object to the FDA’s proposal to have growers formally document the picking, handling and transportation of produce so that health officials could quickly recall foods if necessary.
Consumer groups criticized the FDA guidelines as of little use because they will not carry the force of law. But stricter regulations could evolve as researchers find new technology or methods to kill harmful bacteria or parasites, the FDA said.
The FDA recommendations are due to be made final by the FDA later this year for use by US and foreign growers. The matter of encouraging foreign growers to adopt the guidelines remains somewhat tricky but FDA officials say it is vital because of the huge amount of imported produce.
The last paragraph suggests that ______.

A:some tricks need to be adopted to encourage foreign growers to follow the FDA guidelines B:a good way should be found to encourage foreign growers to follow the FDA guidelines C:foreign growers consider the guidelines to be of great importance to them D:it is almost impossible to ask foreign growers to follow the guidelines

{{B}}第二篇{{/B}}

The last paragraph suggests that

A:some tricks need to be adopted to encourage foreign growers to follow the FDA guidelines. B:a good way should be found to encourage foreign growers to follow the FDA guidelines. C:foreign growers consider the guidelines to be of great importance to them. D:it is almost impossible to ask foreign growers to follow the guidelines.

略

用荧光素双醋酸酯（FDA）染料染色动物细胞，以鉴别动物细胞的生活力.其染色机理如下：FDA本身不产生荧光，也无极性，能自由出入完整的细胞膜.当FDA进入活细胞后，被细胞内的脂酶分解，生成有极性的、能产生绿色荧光的物质﹣﹣荧光素，该物质不能自由透过活的细胞膜，积累在细胞膜内.下列叙述正确的是（）

A: 活细胞产生绿色荧光，因其使FDA分解产生荧光素 B: 死细胞产生绿色荧光，因其细胞膜的通透性增加 C: 若细胞壁有损伤，FDA则会从细胞中流失，观察不到荧光 D: 细胞膜的流动性决定了FDA和荧光素是否能自由透过活的细胞膜

人们曾用求神膜拜自然

　 用思维证明自然

　 后来用观察、想象和检验

摸清了大自然的脾气

但景象不断变幻

大自然在微笑——

仍然没有供出她内心的秘密

——摘编自{英}W.C.丹皮尔《科学史及其与哲学和zōng jiāo 的关系》

下列对材料理解正确的是（ ）

A.科学的“思维”能证实大自然“内心的秘密”

B.摸清“大自然的脾气”，就是对不断变幻的“景象”的感知

C.只有不断摸清“大自然的脾气”，才能接近“内心的秘密”

D.人们能认识不断变幻的“景象”，也能彻底把握“内心的秘密”

C

解析:

材料强调只有在丰富的材料的基础上加上科学的思维才能透过现象看本质把握事物的本质和规律，所以AB说法错误。D说的是人可以正确认识世界，是强调结果而非过程，不是材料所强调的，所以不选。