填空题

Natural gas is mainly made up of methane and other hydrocarbon gasses.

【参考答案】

Y
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填空题
This passage explains the basic idea of NGVs and examines the benefits and shortcomings of this technology.
单项选择题
According to the passage, opponents of the private ownership of H-bombs are very much worried that ______
A.the influence of the association is too powerful for the less privileged to overcome
B.poorly-educated Americans will find it difficult to make use of the weapon
C.the wide use of the weapon will push up living expenses tremendously
D.the cost of the weapon will put citizens on an unequal basis
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