They went out for a walk after dinner as they normally did.
A. partly
B. usually
C. highly
D. fully
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在进行临边作业时设置防护栏杆横杆长度大于()时,必须架设栏杆柱。
A. 1.5m
B. 1.0m
C. 2.5m
D. 2.0m
在建工程(包括脚手架)的外侧边缘与外电架空线路的边缘之间,必须保持安全距离。当外电线电压为10kv时,应不小于()m
A. 2
B. 4
C. 6
D. 8
为预防碘缺乏,常在缺碘地区用碘化物强化食盐,碘加入量一般控制在()。
A. 1:(200~500)
B. 1:(2000~5000)
C. 1:(20000~50ooo)
D. 1:(200000500000)
E. 0.019/6~0.02%
The student is afraid to answer the teacher‘s question.
A. hope
B. use
C. help
D. reply