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【多选题】
下列哪些是 劳动保护用品的正确使用方法A.
选择好焊接防护面罩上护目镜的遮光号以及气焊、气割防护镜的眼镜片。
B.
电焊手套和焊工防护鞋不应潮湿和破损。
C.
在仰焊、切割时，为了防止火星、熔渣从高处溅落到头部和肩上，焊工应在颈部围毛巾，穿着用防燃材料制成的护肩、长套袖、围裙和鞋盖。
D.
佩带各种耳塞时，要将塞帽部分轻轻推入外耳道内，使它和耳道贴合，不要使劲太猛或塞得太紧。
E.
正确穿戴工作服
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举一反三
【单选题】Which of the following is TRUE about the north polar cap of Mars in summertime?
A.
It is at its largest size.
B.
It is changing its shape all the time.
C.
It is at its smallest size.
D.
It is at its windiest time.
【单选题】He had had a long and uncomfortable trip, for he had been confined ______ the wooden box for over ten hours.
A.
beyond
B.
in
C.
on
D.
to
【简答题】_____________(谁会料到) such a rise in the river in summertime?
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