看图，选出正确的单词填空完成句子。

1. Li Ming puts on his _____________   (skirt, shirt).

2. He puts on his _____________  (pants, socks and shoes, hat and gloves)

3. This is a pair of _____________  (socks, shoes)

4．These new _____________  (gloves, boots) are just right!

5. That pair of _____________  (socks, slippers) is too big!

电弧焊在焊接方法中之所以占主要地位是因为电弧（）转换成熔化焊接过程所需要的热能和机械能。

A.能有效而简单的把光能

B.能有效而简单的把电能

C.能有效而简单的把化学能

D.能有效而简单的把光能和机械能