消防员隔热防护服隔热上衣和隔热裤多层面料之间的重叠部分不应小于()。
参考答案:200mm
There’s still 5 minutes before the train leave. If we hadn’t taken a taxi, we _______ late.
A will be B. would have been C. have been D would be
中子或质子束可引起()
A.雪盲
B.日光性视网膜病变
C.放射性视神经病变
D.吹玻璃工人白内障
E.视网膜出血