[单项选择]What is the recommended stock of coal
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[单项选择]What is the recommended stock of coal
A. 115 tons.
B. 45 tons.
C. 70 tons.

[简答题]What is Common Stock？

[单项选择]What is the recommended order of organizing your data
A. A chronological order．
B. A theme order．
C. An event order．

[简答题]What was the trend for the resident stock companies at the end of the 19th century

[单项选择] Underground Coal Fires Coal burning deep underground in China, India and Indonesia is threatening the　environment and human life, scientists have warned. These large scale ______ (51)　blazes (火焰) cause the ground temperature to heat up and kill surrounding vegetation,　produce greenhouse gases and can ______ (52) ignite (点燃) forest fires, a group of　scientists told the annual meeting of the American Association for the Advancement of　Science in Denver . The resulting ______ (53) of poisonous elements like mercury　can also pollute local water sources and soils, they warned. “Coal fires are a global disaster,” said Associate Professor Glenn Stracher of East　Georgia Collage in Swainsboro, USA. But ______ (54) few people know about them.　 Coal can heat up on its own, and eventually catch fire and burn, if there is a continuous oxygen supply. The heat produced is not caused to ______ (55) and　under the right combinations of sunlight and oxy
A. comparison
B. case
C. time
D. turn