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【单选题】
如图 5 所示(机头朝向纸面),由于诱导阻力的存在,机翼翼尖气流产生的漩涡方向是()。A.
左边顺时针,右边逆时针
B.
左边逆时针,右边逆时针
C.
左右都是逆时针
D.
左右时针
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反馈参考答案：
举一反三
【单选题】—He didn't go to the lecture this morning, did he? —______. Though he was not feeling very well. [ ]
A.
No, he didn't.
B.
Yes, he did.
C.
No, he did.
D.
Yes, he didn't.
【单选题】And he began to laugh again, and that so ________， that though I did not see the joke as he did, I was again obliged to join him in his mirth. [ ]
A.
blindly
B.
coldly
C.
heartily
D.
wildly
【单选题】He did not write _________,though(尽管)he had______ &sh
A.
He did not write _________,though(尽管)he had______ 。 A．careful enough; enough time
B.
carefully enough;enough time
C.
enough careful;enough time
D.
enough carefully; time enough
【单选题】______ he did, he would never give up.
A.
Though hard
B.
As hard
C.
Hard if
D.
Hard though
【单选题】— He didn't win the race at last, did he? — _________, though he tried to run as fast as he could. [ ]
A.
No, he didn't
B.
Yes, he did
C.
No, he did
D.
Yes, he didn't
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