问题
填空题
科学家在研究地月组成的系统时，从地球向月球发射激光，测得激光往返时间为t。若已知万有引力恒量为G，月球绕地球旋转（可看成匀速圆周运动）的周期为T，光速为c，地球到月球的距离远大于它们的半径。则由以上述物理量可以求出月球到地球的距离为______________；可求得地球的质量为______________。
答案
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科学家在研究地月组成的系统时，从地球向月球发射激光，测得激光往返时间为t。若已知万有引力恒量为G，月球绕地球旋转（可看成匀速圆周运动）的周期为T，光速为c，地球到月球的距离远大于它们的半径。则由以上述物理量可以求出月球到地球的距离为______________；可求得地球的质量为______________。
| 阅读理解。 |
| I was being interviewed by a senior manager for a major insurance (保险业) company. I told him honestly why I wanted the job-I needed to keep my family in Boston. My wife recently died of a heart attack (心脏病). A job in Boston would help me reduce some of the extreme trauma (精神创伤) and pain of the loss for my 16-year-old daughter. It was important for me to keep her in her high school. I could still hardly talk about the loss of my wife. Bruce, the interviewer, was politely empathetic, but he didn't probe (彻底调查) any further. He admitted (接受) my loss and, with great respect, moved on to another subject. After the next round of the interview, Bruce took me to lunch with another person. Then he asked me to take a walk with him. He told me that he, too, had lost his wife. And, like me, he had also been married 20 years and had three children. In his sharing, I realized that he had experienced the same pain as I had a pain that was almost impossible to explain to someone who had not lost a beloved one. He offered his business card and home phone number and suggested that, if I need help or just want someone to talk to, I should feel free to give him a call. Whether I got the job or not, he wanted me to know that he was there if I ever needed help. When he had no idea if we would ever see each other again, he helped our family deal with one of the greatest losses. He turned the normally cold business interview into a caring support for another person in need. |
| 1. The writer took part in the interview because _______. |
[ ] |
| A. he had lost his job and wanted to find a new one B. he had to support his family in Boston C. his wife had recently died of a heart attack D. his daughter needed money for schooling |
| 2. The underlined word "empathetic" in the sixth line means _______. |
[ ] |
| A. kind B. easy-going C. smart D. understanding |
| 3. Which of the following statements is NOT true according to the passage? |
[ ] |
| A. Bruce invited the writer to lunch later. B. Bruce shared his life experience with the writer. C. Bruce was willing to help the writer. D. Bruce finally gave the job to the writer. |
| 4. We can infer (推断) from the passage that _______. |
[ ] |
| A. Bruce and the writer saw each other often B. the writer got little help from Bruce C. the writer learned much from the job interview D. the writer had a better life afterwards |
| 5. What is the best title for the passage? |
[ ] |
| A. An act of kindness B. A pleasant interview C. The same experience D. An important lesson |