外加静磁场强度等于3.0Tesla时，质子进动频率为（）A.14.90MHz B.2

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问题单项选择题

外加静磁场强度等于3.0Tesla时，质子进动频率为（）

A.14.90MHz

B.21.29MHz

C.42.58MHz

D.63.87MHz

E.127.74MHz

答案

参考答案：E

句型转换

句型转换。

1. Jane has shorter hair than Mary. (改为一般疑问句)

_____ Jane _____ shorter hair than Mary?

2. This box is heavy. That box is light: (合并为一句)

This box is _____ _____ that one.

3.I am 15 years old. My brother is 13 years old. (合并为一句)

My brother is two years _____ _____ me.

4. Tom is popular in the class. Peter is popular, too. (合并为一句)

Tom is _____ popular _____ Peter.

5. Do you have time tomorrow morning? (改为同义句)

_____ you _____ tomorrow. morning?

判断题

科学文化素质是一个民族文明素质的核心，是精神文明的灵魂。