室内运用粉迹法调查时打粉厚度为()mm。
A、1~2
B、2~3
C、3~4
D、4~5
参考答案:A
. He wasted a lot of time playing football, otherwise he ________the exam.
A.had passed
B.passed
C.would pass
D.would have passed
()主要特征是虽然人人都知道是违章,但却要照样干,习惯成自然,把违章当作了自觉的自然行为。