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发布时间:2024-03-17 20:47:00

[填空题]在y轴上的0≤y≤2一段上,有一根细棒,其上每一点处的线密度等于该点到棒两端的距离平方之积,则其质心[*]

更多"在y轴上的0≤y≤2一段上,有一根细棒,其上每一点处的线密度等于该点到"的相关试题:

[填空题]在y轴上的0≤y≤2一段上,有一根细棒,其上每一点处的线密度等于该点到棒两端的距离平方之积,则其质心
[单项选择]设无穷长直线L的线密度为1,引力常数为k,则L对距直线为a的单位质点P沿y轴方向的引力为______.
[单项选择]某职工在皮包加工厂负责给皮包上拉链,工作时间从早上八点到下午四点。工作一段时间后,该职工感觉作业单一、乏味,没有兴趣,经常将拉链上错。根据安全人机工程原理,造成失误的原因是()。
A. 肌肉疲劳
B. 体力疲劳
C. 心理疲劳
D. 行为疲劳
[单项选择]18米长的竹竿被截成两段,短的一段是长的一段的4/5,那么,短的一段有多少米长( )
A. 7.5米
B. 8米
C. 8.5米
D. 9米
[单项选择]一根长18米的钢筋被锯成两段,短的一段是长的一段的4/5,问短的一段有多少米长?()
A. 7.5米
B. 8米
C. 8.5米
D. 9米
[单项选择]两根绳子,长的一段是24米,短的一段是18米。两根都截去相同长度的一段后,长的绳子的长度是短绳子长度的4倍。剪短后,长的绳子有多少米( )
A. 6米
B. 2米
C. 8米
D. 4米
[单项选择]

听下面一段对话,回答下列问题。
 

听下面一段对话,回答下列问题。

听下面一段对话,回答下列问题。
W: Hi, Bill, can you tell me how it happened
M: Sure. I was mountain climbing in New Hampshire in 1982. Suddenly the weather became really bad. There was a lot of snow and we couldn’t see anything. We got lost. Well, we spent four days on the mountain. The temperature was 20 degrees below zero, We didn’t have any equipment or food.
W: So what happened I guess someone found you, right
M: Yes, but we were very sick. I couldn’t move my legs because of the cold. f spent two months in the hospital. The doctors removed my legs.
W: Right. So you lost your legs, but you want to try your best to stay active.
M: That’s right. In fact, I decided to make some new legs for myself. I realized that no one had to be physically disabled. We can use modern technology to help us.
W: And you built these great new legs. Can you go mountai
A. Design new climbing shoes.
B. Establish a club for the disabled.
C. Use technology to fight his disability.

[单项选择]

听下面一段对话,回答下列问题。
 

听下面一段对话,回答下列问题。
W: Hi, Bill, can you tell me how it happened
M: Sure. I was mountain climbing in New Hampshire in 1982. Suddenly the weather became really bad. There was a lot of snow and we couldn’t see anything. We got lost. Well, we spent four days on the mountain. The temperature was 20 degrees below zero, We didn’t have any equipment or food.
W: So what happened I guess someone found you, right
M: Yes, but we were very sick. I couldn’t move my legs because of the cold. f spent two months in the hospital. The doctors removed my legs.
W: Right. So you lost your legs, but you want to try your best to stay active.
M: That’s right. In fact, I decided to make some new legs for myself. I realized that no one had to be physically disabled. We can use modern technology to help us.
W: And you built these great new legs. Can you go mountain climbing again
M:
A. Low temperature.
B. Terrible weather.
C. An unsuccessful operation.

[填空题]响应某个事件后所执行的操作通过一段程序代码来实现,这样的一段程序代码叫做 【6】
[单项选择]

听下面一段对话,回答第14至第17题。
 

听下面一段对话,回答第14至第17题。
M: Hi, mom.
W: There you are. I’m getting worried. It’s so late.
M: Yes. I ran into Linda and we went to a pub. She told me a funny thing.
W: Oh What was that
M: Well, she was driving home after work, and she suddenly saw an old lady on her hands and knees in the middle of the road.
W: Really
M: Yes, Linda was so shocked that she stopped suddenly and the car behind crashed into hers.
W: Was she hurt
M: No.
W: And what was the old lady doing
M: I am just coming to that. So Linda got out of her car and saw the old lady pick up something and walk away.
W: Lucky indeed. Linda didn’t run her over.
M: Then a policeman came. But he didn’t believe what Linda said.
W: Well ...
M: Luckily there was a witness, a man waiting for a bus. He saw it all. Guess what the old lady was doingA. Seeking passers-by’s help.
B. Trying to stand up.
C. Looking for something.
D. Calling the police.

[填空题]响应某个事件后所执行的操作通过一段程序代码来实现,这样的一段程序代码叫做______。

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