搜题请搜索小程序“爱下问搜题”
问题 单项选择题

器官移植在近年获得较快发展，是何种药物的问世使器官移植后排异反应及死亡率明显下降（）

A.泼尼松

B.甲基泼尼龙

C.环孢素A

D.第四代抗生素

E.B和C

答案

参考答案：C

填空题

根据句意及所给提示完成单词。

1. The ______ (运输) of goods by plane (飞机) is very expensive.

2. She can ______ (几乎不) walk any longer.

3. He can't go to school because of his ______ (病).

4. What's the matter w______ her?

5. Do you want to go f______ this weekend?

6. The ______ (旅客) are going to visit the Great Wall.

7. She wants to be an actress when she g______ up.

8. During the summer v______, my family will go to Qingdao for sightseeing.

9. We should keep the ______ (平衡) of nature.

10. There's no ______ (不同) between the two boys.

查看答案
计算题

一初速度为零的带电粒子从A板处经电压为U=4.0×103V的匀强电场加速后，到B板处获得5.0×103m/s的速度，粒子通过加速电场的时间t=1.0×10-4s，不计重力作用，

（1）带电粒子的比荷为多大？

（2）匀强电场的场强为多大？

（3）粒子通过电场过程中的位移为多
查看答案