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【简答题】
(共用题干) 汽车等机动车辆排放出的尾气在太阳紫外线的照射下可形成二次污染物。 二次污染物为A.二氧化硫 B.硫酸雾 C.酸雨 D.硝酸雨 E.光化学烟雾 一天中污染物污染最为严重的时间一般为A.凌晨 B.上午 C.中午 D.傍晚 E.夜晚
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【简答题】What can be used to separate cargo in a hold?
【单选题】David is so curious that no one can ________ from finding out what is going on.
A.
hold him back
B.
hold him up
C.
hold to him
D.
hold him down
【单选题】You can stow poisonous and flammable goods in one hold
A.
Poisonous goods can be stowed away from flammable goods by one hold
B.
Poisonous goods shall not be stowed in the same hold with flammable goods
C.
Poisonous goods and flammable goods can be stowed in one hold
D.
Poisonous goods and flammable goods cannot be stowed in one hold
【单选题】A(n) ____ folder is similar to a drop box; it can hold files and folders that you want to share with other people on your network.
A.
Offline
B.
Online
C.
Private
D.
Public
【单选题】The production can be ______ for several months by the strike.
A.
hold in
B.
hold up
C.
hold on
D.
hold with
【单选题】Folders can hold other folders called ____.
A.
mini-folders
B.
subfolders
C.
objects
D.
tiered-folders
【单选题】Don’t worry. We can stay here as long as our supplies .
A.
hold up
B.
hold out
C.
hold on
D.
hold back
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