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问题 选择题

马克思主义传入中国并被中国先进知识分子接受是因为

①苏俄十月革命的胜利②“五四”运动的开展③产业工人阶级队伍的形成④近代仁人志士探索的失败[ ]

A．①②

B．①②③

C．①②④

D．①②③④

答案

答案：D

单项选择题

A real estate developer in Florida, desiring to protect his high-rise apartment building on the beach from hurricane damage, has planted sea oats in two rows in front of his building in order to encourage the development of sand dunes between the water and his building.
Which of the following, if true, casts the most doubt on the probable effectiveness of the developer’s plan ？（）

A. Sand dunes provide little protection for tall buildings against the wind, which is sufficiently powerful even in minor hurricanes to cause serious damage to buildings.

B. Sand dunes have been shown to provide effective protection against the storm surge, the pounding waves driven by hurricane-force winds onto dry land.

C. Although sea oats will lead to the growth of sand dunes over many years, it would be far faster to build concrete bunkers between the building and the water.

D. Hurricane insurance has become so expensive that many owners of beachfront property choose not to buy it.

E. The developer has invested in reinforced steel girders and shatterproof glass as a way of minimizing damage to his building in the event that a hurricane hits the area.
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判断题

挖掘机一次行走距离超过200米必须使主动轴在后，并由专人指挥。
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