注射用美洛西林/舒巴坦 规格1.25（美洛西林1.0g，舒巴坦0.25g）。成人静脉符合单室模型。美洛西林表现分布溶剂V=0.5L/Kg。

体重60Kg患者用此药进行呼吸系统感染治疗希望美洛西林/舒巴坦可达到0.1g/L，需给美洛西林/舒巴坦的负荷剂量为

A:1.25g（1瓶） B:2.5g（2瓶） C:3.75g（3瓶） D:5.0g（4瓶） E:6.25g（5瓶）

G653光纤在1550nm附近色散极小，但由于（）导致G653并不适合于DmM传输。

A:受激拉曼散射SRS B:受激布里渊散射SBS C:四波混频FWM D:衰减

ITU-T已规范了4种类型的单模光纤，即G.652光纤、G.653光纤、G.654光纤和G.655光纤。接入光缆网中常用（）。

A:G.652光纤 B:G.653光纤 C:G.654光纤 D:G.655光纤

光传输使用的光纤目前常见的有G.652、G.653、G.654和G.655，下列描述错误的是（）。

A:我国大量铺设的为G.652光纤 B:都是单模光纤 C:最适合波分使用的是G.655光纤 D:G.653和G.654光纤没有商用价值

C What you feed a newborn baby during the first week of life could be critical in deciding whether that baby grows up to be obese (肥胖的), U.S. researchers say. They found that formulafed babies who gained weight rapidly during their first week of life were significantly more likely to be overweight decades later. It suggests that there may be a critical period in that first week during which the bodys physiology may be programmed to develop chronic disease (慢性病) throughout life. Our findings also point towards new potential targets for preventing obesity. If these results are confirmed by other studies, they may lead to interventions in newborns to help prevent longterm development of obesity. This team studied 653 white adults aged 20 to 32. They said each additional 100g of weight gained during the first eight days of life increased a babys risk of becoming an overweight adult by about 10 percent. The study also helps reinforce recommendations that mothers breastfeed their babies. For a variety of health reasons, the American Association of Paediatrics recommends exclusive breastfeeding during a babys first six months of life. Breastfed babies are less likely to be overweight. In a special issue on obesity, the Heart Association said childhood obesity was such a critical public health problem that it could reverse the gains made over the last 50 years in reducing heart disease and death. An estimated 16 percent of US children are overweight and carry a significant risk of developing heart disease and diabetes while young adults. Only 64 percent of mothers initiate breastfeeding, and only 29 percent of babies are still being breastfed when they are six months of age. Rates of initiation and duration are even lower among AfricanAmerican women. The Heart Association has called for a multipronged approach to preventing childhood obesity involving families, the health care system, private insurers, government agencies, schools and the food and entertainment industries. Which of the following statements is not true

A:Only 29 percent of babies are still breastfed at the age of six months. B:About 16 percent of US children are developing heart disease and diabetes. C:Only 64 percent of mothers breastfeed the babies after their birth. D:653 white adults aged 20 to 32 were studied by the team on the subject.

G653 光纤在 1550nm 附近色散极小 ，但由于 (　)导致 G653 并不适合于 DmM 传输。

A:受激拉曼散射 SRS B:受激布里渊散射 SBS C:四波混频 FWM D:衰减

假若使用G.653光纤在零色散波长区，传输 3路WDM 系统，传输25km以后，就可 能产生不可弥补的失真，解决的办法有 （ ）。

A:采用不等间隔的波长安排 B:增加光通路的间隔 C:适当缩短光放大器间距 D:适当加大光放大器间距

G.653光纤在1550nm附近色散极小，但由于(　)导致G.653并不适合于DWDM 传 输。

A:受激拉曼散射SRS B:受激布里渊散射SBS C:四波混频FWM D:衰减

在本地网中采用G.652和G.655光纤从传输系统性能和应用上基本没有差别。 因此，在本地网建设中，原则上应选用光纤（）。

A:G.653 B:G.655 C:G.652 D:G.654