山间公路往往盘山而上,这样可以使上山的汽车减 小所需的牵引力,请解释其原因.

题型:问答题

问题:

山间公路往往盘山而上,这样可以使上山的汽车减   小所需的牵引力,请解释其原因.

考点:功的计算公式的应用功的原理
题型:问答题

阅读理解

       John Brown, an office worker, lives in Washington, and he inherited(继承)$1,000,000 when he

was 23. He didn't feel happy at all. His college friends were looking for their first jobs, but he didn't

have to. John decided to keep living a simple life like everyone else. He didn't tell any of his friends

and gave$100,000 of his money to a charity(慈善团体) that helped poor children to live better

lives. Today he is 36. He still wears cheap shoes and clothes and owns a small car only, but he is

much happier.

       Up to now John has helped 15 children from poor countries all over the world, $200 a month

for each. The child does not receive the money in cash(现金). The money pays for the child's school

expenses, food, medical care and clothing. John receives a report each year on the child's progress.

They can write to each other, but usually the children do not speak English. 

       When John first heard about these children, he wanted to help them."It was not

anything special,"he said, "Until I had the chance to go to these countries and meet the children I was

helping, I did not know any thing about the type of life they had."

       Once John went to meet a little girl in Africa. He said that the meeting was very

exciting.

       "When I met her, I felt very very happy," he said," I saw that the money was used

for a very good plan. It brought me closer to the child in a way that giving money alone cannot." "I

want to do everything I can. I will go on helping those children in need." he added.

根据短文内容回答下列问题

1. What kind of life is John living?

He is living a _____________________________________________________

2. Did John want to look for a job or stay at home after he got the money?

_______________________________________________________________

3. Does John only help the poor children in Africa?

_______________________________________________________________

4. The child receives the money in cash, doesn't he?

_______________________________________________________________

5. Why did John say that the meeting with the little girl was very exciting?

Because he saw his money was well used and this made him_____________.

6. How do you like John Brown?

He is___________________________________________________________

题型:问答题

二十七岁初产妇,身高149cm,妊娠40周,16小时前出现阵痛,2小时前宫口开全,胎头高浮,无胎儿娩出征象,缩宫素10U加于5%葡萄糖250ml静滴,不久,孕妇自觉腹部剧痛,不缓解,呼叫不止。根据上述病史及临床表现。正确处理为()

A.继续严密观察,等待时机接产

B.急诊行剖腹探查

C.立即送产妇上床,经 * * 助产

D.立即将先露部送回子宫,行剖宫产

E.先输液止血再产钳助产

题型:问答题

如图,关于水平桌面上的书与桌面间的相互作用说法正确的是(     )

A.书对桌面的压力就是书所受的重力

B.书对桌面施加了压力,但桌面没有发生形变

C.书对桌面的压力是由于书发生形变而产生的

D.桌面对书的支持力不属于弹力

题型:问答题

以下对系统测试应遵循的原则描述不正确的是( )。

A.测试工作应避免由原开发软件的个人或小组来承担

B.测试用例不仅要包括合理、有效的输入数据,还要包括无效的不合理的输入数据

C.软件中仍存在错误的概率与已经发现的错误的个数是成正比的

D.不必保留测试用例

题型:问答题

HLA血清学分型法属于

A.补体依赖性细胞毒反应
B.Tc细胞介导的细胞毒反应
C.NK细胞介导的细胞毒反应
D.ADCC
E.低渗情况下细胞溶解

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