金库保管区、作业区、交接区、装卸区区及通道监控录像资料须保留()以上。
A.10天
B.一个月
C.二个月
D.三个月
参考答案:D
所谓近距离摄影,是指焦-片距为
A.15~20cm
B.25~30cm
C.35~50cm
D.55~60cm
E.65~70cm
用所给的提示词组成一个if 引导的条件状语从句
1.be tired,have a rest
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2.the weather,tomorrow is fine/have a picnic
3.not go to bed early/feel tired
4.not eat vegetables/become unhealthy
5.not listen to the teacher/not study well