职业病危害因素检测中,涂装废气主要检测()含量。
A、苯
B、甲苯
C、二甲苯
D、酒精
参考答案:A, B, C
Don't be afraid of new words. You can ______ in the dictionary. [ ]
A. look at them
B. look for them
C. look them up
D. look them over
零担货物运输主要是指托运人一次托运货物计费重量______的货物运输方式。
A.3吨及以下 B.3吨以上C.5吨及以下 D.5吨以上