You are a college student and want to be a volunteer in Beijing 2022 Olympic Winter Games.
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配电室至结构主体位采用埋地敷设,埋设深度为()m。电缆上下左右均匀铺50mm厚细砂,上面用红机砖满铺保护,回填细土。
A. 0.8
B. 0.7
C. 1.0
外保温墙上安装空调室外机,固定三角架的膨胀螺栓必须是()。
A. 普通型
B. 加长型
C. 加宽
禁止在起吊高度的()倍半径内有其他作业和非作业人员在内。
A. 1
B. 1.2
C. 2
What is the main idea of this passage？
A. Gold prices are very volatile.
B. Gold prices may drop further.
C. Gold is a perfect inflation hedge.
D. Predicting gold prices is very difficult.
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