当负荷在什么情况下，运动员机体就会发生劣变（）。 A.一般负荷 B.最大负荷 C.过

(四)

"Congratulations, Mr. Jones, it’s a girl. "
Fatherhood is going to have a different meaning and bring forth a different answer from every man who hears these words. Some feel proud when they receive the news, while others worry, wondering whether they will be good fathers. Although there are some men who like children and may have had considerable experience with them, others do not particularly care for children and spend little time with them. Many fathers and mothers have been planning and looking forward to children for some time. For other couples, pregnancy was an accident that both husband and wife have accepted willingly or unwillingly.
Whatever the reaction to the birth of a child, it is obvious that the change from the role of husband to that of father is a difficult task. Yet, unfortunately, few attempts have been made to educate fathers in this re-socialization process. Although many good books have been written about American mothers, only recently have some books discussed the role of a father.
It is argued by some writers that the transition to the father’s role, although difficult, is not nearly as great as the transition the wife must make to the mother’s role. The mother’s role seems to require a complete transformation of daily routine and adaptation to a new life, on the other hand, the father’s role is less demanding and immediate. However, even though we have mentioned the fact that growing numbers of women are working outside the homey the father is still thought by many as the breadwinner in the household.

Some writers argue that with respect to the change of roles, fathers, compared with mothers, ______.

A．have to do more in the household

B．have to make more difficult adaptations

C．have an easier job to do

D．can usually do a better job

下列不属于食品企业建筑设计建筑剖面图卫生审查内容的是（）

A.根据层高、净高、门窗洞高度尺寸，结合平面图长、宽尺寸全面地评价建筑物通风、采光

B.审查房屋内部地面、顶棚、墙面的装修情况是否符合规范要求

C.对高层建筑物的供水、排水、采暖、通风等设备，管道的卫生防护情况作出评价

D.对窗户形状、大小是否符合通风采光要求，作出评价

E.根据房屋的墙身、屋面、楼面、楼梯等的构造和所用材料，结合结构图对其隔音、保温、防电离辐射情况作出评价

对定点零售药店、基本医疗保险用药品种等进行必要的行政管理是（）

A．药品监督管理部门的职能 

B．公安部门的职能 

C．国防科工委、环境保护部门的职能 

D．劳动与社会保障部门的职能 

E．工商行政管理部门的职能

阅读理解。

     Maybe ten-year-old Elizabeth put it best when she said to her father, "But, Dad, you can't be healthy if

you're dead."

     Dad, in a hurry to get home before dark so he could go for a run, had forgotten to wear his safety belt-a

mistake 75% of the US population make every day. The big question is why.

     There have been many myths (谬论) about safety belts ever since their first appearance m cars some

forty years ago. The following are three of the most common.

     Myth Number One: It's best to be "thrown clear" of a serious accident.

     Truth: Sorry, but any accident serious enough to "throw you clear" is also going to be serious enough

to give you a very bad landing. And chances are that you'll have traveled through a wind-shield (挡风玻璃)

or door to do it. Studies show that chances of dying after a car accident are twenty-five times greater in

cases where people are "thrown clear".

     Myth Number Two: Safety belts "trap" people in cars that are burning or sinking in water.

     Truth: Sorry again but studies show that people knocked unconscious (昏迷) due to not wearing safety

belts have a greater chance of dying in these accidents. People wearing safety belts are usually protected to

the point of having a clear head to free themselves from such dangerous situations, not to be trapped in them.

     Myth Number Three: Safety belts aren't needed at speeds of less than 30 miles per hour.

     Truth: When two cars traveling at 30 mph hit each other, an unbelted driver would meet the windshield

with a force equal to diving head first into the ground from a height of 10 meters.

1. Why did Elizabeth say to her father "But, Dad, you can't be healthy if you're dead"?

A. He was driving at great speed.

B. He was running across the street.

C. He didn't have his safety belt on.

D. He didn't take his medicine on time.

2. The reason why Father was in a hurry to get home was that he _____.

A. wasn't feeling very well

B. hated to drive in the dark

C. wanted to take some exercise

D. didn't want to be caught by the police

3. According to the text, to be "thrown clear" of a serious accident is very dangerous because you _____.

A. may be knocked down by other cars

B. may get seriously hurt being thrown out of the car

C. may find it impossible to get away from the seat

D. may get caught in the car door

4. Some people prefer to drive without wearing a safety belt be- cause they believe _____.

A. the belt prevents them from escaping in an accident

B. they will be unable to think clearly in an accident

C. they will be caught when help comes

D. cars catch fire easily

5. What is the advice given in the text?

A. Never drive faster than 30 miles an hour.

B. Try your best to save yourself in a car accident.

C. Never forget to wear a safety belt while driving.

D. Drive slowly while you're not wearing a safety belt.

某一UN＝380V/220V低压三相照明系统，COSα＝0.6。系统总干线计算电流为Ijs＝350A，求：

若将功率因数由0.6提高为0.9，需要多大Qc