高处作业工程模板安装,在()及二层以上操作时周围应设安全网、防护栏杆。
A.2m
B.3m
C.4m
D.5m
参考答案:C
解析:高处作业工程模板安装,在4m及二层以上操作时周围应设安全网、防护栏杆。
高处作业工程模板安装,在()及二层以上操作时周围应设安全网、防护栏杆。
A.2m
B.3m
C.4m
D.5m
参考答案:C
解析:高处作业工程模板安装,在4m及二层以上操作时周围应设安全网、防护栏杆。
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1. The least likely choice for 5-year-old Jack to make among the museums is . A. MMI B. NYHS C. QMA D. QCFM 2. According to the text, which of the following is NOT true? A. All the museums mentioned above lie in New York City. B. No other museum in New York City is better than MMI. C. Lucky visitors can see grapes in one of the museums. D. NYHS has the most hands-on activities in America. 3. We can know from the text that . A. people can visit only one of the museums any time and any day B. visitors can pay a visit to all the museums by subway C. there is often a rare bird flying in the sky above MMI D. the Panorama is, as a matter of fact, a great gift shop |