《中华人民共和国建筑法》是我国第( )部规范建筑活动的部门法律。
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从事高处作业的人员应年满( )周岁，身体健康。
A. 16
B. 18
C. 20
D. 22
—Can you come on Monday or Tuesday —I am afraid______ day is possible.
A. either
B. neither
C. some
D. any
主要路段的施工现场周围，必须设置高( )标准规范的组合装配式蓝色喷涂钢制围挡。
A. 1.5m
B. 2.5m
C. 3m
D. 3.5
What does the underlined word "it" in the second paragraph refer to
A. Discovering the moon's inner space.
B. Using the earth's inner space.
C. Meeting the "moon people".
D. Traveling to outer spac
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