并行工程的（CE）关键技术

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       There are 365 days in a year. We sleep 8 hours a day, so we have 122 days for sleeping. Then our

work time has 243 days left. But there are 52 weekends in a year. Each weekend is two days. We lose

another 104 days a year for work. It takes us about one hour to have breakfast and supper. This comes

to 15 days over a year. But we can't work all that time-we need a holiday. Let's say we have three weeks' holiday. We don't work all day. Four free hours each evening takes up 61 days. We have to remember

that we get 2 days' holiday at Easter, 3 at Christmas and 1 at the New Year. There are also 4 Bank

holidays. Take those 10 days away and we have 32 days for work. But then we have one and a half hours' lunch every day, and half an hour's coffee break. That comes to 30 days a year. This means that we have

only a few days left for work every year!

1. How many days do we sleep in a year? ___days.

A. 365      

B. 122      

C. 8      

D. 52

2. We spend 15 days on __________.

A. rest      

B. coffee break    

C. lunch    

D. breakfast and supper

3. Which of the following is true? __________

A. Each weekend is one day.        

B. We have 61 days for free time.

C. We get 3 days' holiday at Easter    

D. Coffee break takes us one hour.

4. According to the passage, we know that we don't have ______ time to work every year.

A. much too    

B. so many    

C. too much    

D. too many

5. The writer means __________.

A. we should know the numbers    

B. a few days for work is enough

C. we need more holidays  

D. time is important and we'd better not waste(浪费) it

碳钢的密度一般为（）103kg/m³。

A.1.3～1.6

B.2.5～2.6

C.7.8～7.85

D.8.5～8.9

某一温度下将一定量的M物质的溶液蒸发15克水后，析出2克晶体，再蒸发15克水，又析出5克晶体，若再蒸发15克水，将析出晶体的质量为 [ ]

A、2克

B、5克

C、8克

D、无法判断

下列哪项不会引起继发性脑干损伤（）

A.癫痫

B.额颞部脑挫伤

C.脑水肿

D.颞叶血肿

E.小脑血肿

植入过程中，胚泡的滋养层增生分化形成内层的（）和外层的（）。