On the giant plane there are ______the jet needs.

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问题 On the giant plane there are ______the jet needs.

选项 A、twice engines
B、twice as engines as
C、as twice many engines as
D、twice as many engines as

答案D

解析 本题测试比较级的一种句型。“倍数+as...as”,表示“是……的几倍”。本句大意为:大型飞机上需要的发动机数量是一般喷气飞机的两倍。
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