— People should stop using their cars an

单词拼写。

1. She had many ________ (失败) before finding the right method.

2. After ten years of ________ (婚姻), the couple were divorced.

3. As we joined the big crowd, I got ________ (分开) from my friends.

4. We are warned that a cold current is ________ (很可能)to come.

5. The discovery is important for a ________ (各种各样) of reasons.

6. Thundering is one of the natural ________ (现象).

7. Without any ________ (犹豫), she took up the red flag and rushed out.

8. I found my father sitting in his chair, completely _______ (吸引) in a magazine.

9. There is a lot of oil ________ (漂浮) on sea water.

10. I went ________ (城市商业区) to do some shopping today. 

AX-320型旋转式直流弧焊机是利用变阻器改变激磁电流大小进行电流（）调节，利用改变电刷位置进行电流（）调节。

幸福指数是衡量幸福感具体程度的（）指标数值。

A.客观

B.主观

C.微观

D.宏观

一架飞机，来往于两城之间，顺风时需要5小时30分钟，逆风时需要6小时，已知风速是每小时24千米，求两城之间的距离为多少千米( )

A．3168
B．3328
C．3075
D．3468

闽学家们注重烦琐的文字训诂和名物的考证，认真注释书中典故，注释经书时完全忠实于原作。