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[Sentence Correction]
试题详情
题目：
Whereas high speeds generally cannot be achieved by ramjets without their initially being assisted by a rocket, a scramjet, or supersonic combustion ramjet, can attain high speeds by reducing airflow compression at the entrance of the engine and letting air pass through at supersonic speeds.
选项:
A、Whereas high speeds generally cannot be achieved by ramjets without their initially being assisted by
B、Whereas a ramjet generally cannot achieve high speeds without the initial assistance of
C、With ramjets, high speeds generally are not able to be achieved without initially being assisted by
D、Unlike with ramjets, generally unable to achieve high speeds without the initial assistance of
E、Although a ramjet generally does not have the capability of achieving high speeds without the initial assistance from
答案:
B
提问：
这题后半句是不是少了主语？如果不是原文打错了的话，看不懂主语是谁
解答：
点赞1
阅读2475
提问：
这题后半句是不是少了主语？如果不是原文打错了的话，看不懂主语是谁
解答：
点赞1
阅读2476
提问：
这道题我选的D，但错了，正确选项B的逗号后面can attain的主语是谁啊，我不懂，
解答：
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阅读2322
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