题目内容

The ship's____broke down, and the pumps had to be operated by hand without the help of electricity.

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At the meeting, a(n)____majority, 52 percent, agreed to build a highway through the forest, but nearly 40 percent were strongly against the idea.

As the number of people on earth increases. it becomes more difficult for the population to____on the resources of the land.

The findings showgeneralthat the same problem begins sooner in the country than in towns.

下列关于无土栽培的特点说法不正确的是。( )

A. 可减少病虫害的发生,避免连作障碍。
B. 产量高、品质好。
C. 省水、省肥、省人工。
D. 投资小,效益高。