更多"Photochemical smog exists mainly in"的相关试题:
[填空题]Photochemical smog exists mainly in big cities.
[填空题]Money laundering exists mainly because of the corruption of officials in the government.
[填空题]Photochemical smog is formed on rainy days when chemicals are combined with smoke.
[简答题]The oil price is also a big risk, mainly because the Bush administration appears determined to attack Iraq. The probability of war could easily push the oil price back into the ＄35～＄40 a barrel range for at least a few months. In effect, that would impose a big new tax on consumer spending and corporate profits. The prospect of monetary tightening and a sharp increase in the oil price suggests that late 2002 and early 2003 could be a period of great volatility for the US economy.
[填空题]Smog is caused by chemical reactions between pollutants derived from different sources, primarily automobile exhaust and industrial emissions.
[填空题]Smog does great harm to the respiratory system.
[填空题]Smog has become the most serious type of pollution.
[填空题]More than 400 people were killed in the black smog which struck London in 1952.
