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。
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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.
安全标志包括:禁止标志、警示标志、指令标志、提示标志、说明标志、环境信息标志、和()标志7种。
A. 局部
B. 外部
C. 内部
It can be inferred from Paragraph 1 that in 2012______.
A. gold was getting cheaper
B. gold was about to experience a downfall
C. the price of gold was climbing
D. the sale of gold was declining
Which of the following can function as an inflation hedge like gold？
A. Oil and natural gas.
B. Deposits.
C. Bonds.
D. Stocks.
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