| D:)总费用C | (c)×1.1< 已知某类工程的朗格系数如下表所示： 朗格系数KL | 2.574 | 内
容 | A:(a)包括基础、设备、绝热、油漆及设备安装费 | E×1.5 | | B:(b)包括上述在内和配管工程费 | (a)×1.2 | | C:(c)装置直接费 | (b)×1.3 | | D:(d)总费用C | (c)×1.1 |
若该项目的设备购置费E为1500万元，则配管工程费为( )万元。 E:3861 2700 450 300{{B}}第二篇{{/B}}
{{B}}? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ?Obesity{{/B}}
? ?Obesity
refers to the medical condition characterized by storage of excess body fat. The
human body naturally stores fat tissue under the skin and around organs and
joints. Fat is critical for good health because it is a source of energy when
the body lacks the energy necessary to sustain life processes, and it provides
insulation and protection for internal organs. But too much fat in the body is
associated with a variety of health problems.
? ?Most physicians
use the body mass index (BMI) to determine desirable weights. BMI is calculated
as weight divided by height and people with a BMI of 27 or above are considered
obese.
? ?Weight-height tables, such as those published by the
Metropolitan Life Insurance Company, are also used as general measures of
desirable weight ranges3. These tables assign a range of weights for a
particular height. For example, a man of 1.8 m has a desirable range of 66 to 83
kg, with an average of 75 kg. A woman who is 1.6 m has a desirable range between
53 and 70 kg, with an average of 62 kg.
? ?The BMI and
weight-height tables only provide rough estimates of desirable weights and
scientists recognize that many other factors besides height affect weight.
Weight alone may not be an indicator of fat, as in the case of a body-builder
who may have a high BMI because of a high percentage of muscle tissue, which
weighs more than fat. Likewise, a person with a sedentary lifestyle may be
within a desirable weight range but have excess fat tissue.
?
?Obesity increases the risk of developing disease. According to some
estimates, almost 70 percent of heart disease cases are linked to excess body
fat, and obese people are more than twice as likely to develop high blood
pressure. Obese women are at nearly twice the risk for developing breast cancer,
and all obese people have an estimated 42 percent higher chance of developing
colon cancer. The risk of medical complications, particularly heart disease,
increases when body fat is distributed around the waist, especially in the
abdomen. This type of upper body fat distribution is more common in men than in
women.
? ?The social and psychological problems experienced by
obese people are also formidable. Stereotypes about "fat" people are often
translated into discriminatory practices in education, employment, and social
relationships. The consequences of being obese in a world where people had
better be "thin" are especially severe for women, whose appearances are often
judged against an ideal of exaggerated slimness.
| If a woman is 1.6m tall and weighs 49 kg, she A:is considered within the desirable weight-height range. B:is definitely unhealthy. C:should be considered fat. D:should not be considered unhealthy.
? ?下面有3篇短文，每篇短文后有5道题。请根据短文内容，为每题确定1个最佳选项。 ?
?
{{B}}第一篇{{/B}}
? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ?
?{{B}}Losing Weight{{/B}}
? ?Girls as young as 10 years old are
dieting and in danger of developing unhealthy attitudes to weight, body image
and food, a group of Toronto researchers reported Tuesday.
? ?Their
study of 2,279 girls aged 10 to 14 showed that while the vast majority had
healthy weights, nearly a third felt they were overweight (超重的) and were trying
to lose pounds. Even at the tender (幼稚的) age of 10, nearly 32 percent of the
girls felt "too fat" and 31 percent said they were trying to diet.
?
?McVey, a researcher at the Hospital for Sick Children in Toronto, and her
colleagues analyzed data collected in a number of surveys of southern Ontario
schoolgirls between 1993 and 2003, reporting their findings in Tuesday’s issue
of the Canadian Medical Association Journal.
? ?Nearly 80 percent
of the girls had a healthy body weight and only 7.2 percent were considered
overweight using standard weight-to-height ratios. Most researchers suggest the
rate of overweight children in this country is several times higher than that
figure.
? ?Nearly 30 percent of the girls reported they were
currently trying to lose weight, though few admitted to dangerous behavior such
as self-induced vomiting (自导的呕吐).
? ?Still, a test that measured
attitudes towards eating showed 10.5 percent of survey participants were already
at risk of developing an eating disorder.
? ?"We’re not talking
about kids who’ve been prescribed (嘱咐) a diet because they’re above average
weight or overweight. We’re talking about children who are within a healthy
weight range. And they have taken it upon themselves to diet to lose weight,"
McVey said, acknowledging she found the rates disturbing. She said striking a
balance between healthy weights and healthy attitudes towards food and body
image is a complex task, with no easy solutions. | Unhealthy attitudes to weight, body image and food may A:arise from dangerous behavior B:lead to an eating disorder C:result in an increase in height D:keep the balance between height and weight 在HTML中，表格边框的宽度由（）属性指定。 A:width B:height C:border D:cellpadding 在HTML文件中，表格边框的宽度由（）属性指定。 A:width B:height C:border D:cellpadding 设关系R：
经操作Л A，B(σC=’c’(R))的运算结果是( )。(Л为“投影”操作符，σ为“选择”操作符) A: B:
C:
D:
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