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【多选题】
《建筑起重机械安全监督管理规定》，使用单位应当履行下列安全职责：（ ）。A.
根据不同施工阶段、周围环境以及季节、气候的变化，对建筑起重机械采取相应的安全防护措施
B.
可以不制定建筑起重机械生产安全事故应急救援预案
C.
在建筑起重机械活动范围内设置明显的安全警示标志，对集中作业区做好安全防护
D.
设置相应的设备管理机构或者配备专职的设备管理人员，指定专职设备管理人员、专职安全生产管理人员进行现场监督检查
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【简答题】Many people have learned a foreign language in their own country; others have learned a foreign language in the country in which it is spoken. Which is better? Give the advantages of each and support ...
【单选题】because they _12_
A.
have not learned to write
B.
have learned to write
C.
had learned how to write
D.
had not learned to write
【单选题】We ____five English songs by the end of last term. A had learned B learned C have learned D will have learned
A.
had learned B learned C have learned D will have learned
B.
learned C have learned D will have learned
C.
have learned D will have learned
D.
will have learned
【简答题】Some of the students havealready learned enough English to ____ a conversation with a native Englishspeaker. A. holdon B. keep on C. goon D. carry on
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