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【简答题】
渐开线标准斜齿圆柱齿轮正确啮合的条件是什么？并简述齿轮加工的两种方法？
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反馈参考答案：
举一反三
【单选题】The last sentence of this passage implies that______.
A.
the ultralight plane is mainly used for the amusement
B.
the ultralight plane can't develop much
C.
the ultralight plane has no further use
D.
the ultralight plane is the same with other kinds of planes
【单选题】听力原文：W: Could you tell me the time of the last plane to Hong Kong this evening? M; There's one at 10:15, but it's fully booked, I think. W: Then the time of the first plane tomorrow morning? M: The fi...
A.
Because it's fully booked.
B.
Because it's too late.
C.
Because it's too expensive.
【单选题】Attention please. The last plane to London __________ at 9:00 pm.
A.
take
B.
takes
C.
has taken
【单选题】信息技术与课程整合的讲授模式主要包括两种形式,即[ ]
A.
课堂讲授型和网络讲授型
B.
网上同步讲授型和网上异步讲授型
C.
课堂运用多媒体型和课堂运用网络型
D.
课堂运用多媒体软件型和课堂运用视听媒体型
【单选题】听力原文：W: Could you tell me the time of the last plane to New York this evening? M: There's one at 9:20, but it's fully booked, I think. W: Then the time of the first plane tomorrow morning? M: The firs...
A.
Because it's fully booked.
B.
Because it's too late.
C.
Because it's too expensive.
【单选题】If plane polarized light is sent through two polarizers, the first at 45° to the original plane of polarization and the second at 90° to the original plane of polarization, what fraction of the origin...
A.
0
B.
1/2
C.
1/4
D.
1/8
【单选题】To my ________, I have missed the last plane to travel to Hainan.
A.
regret
B.
delight
C.
joy
D.
relief
相关题目：
【单选题】Attention please. The last plane to London __________ at 9:00 pm.
A.
take
B.
takes
C.
has taken
参考解析：
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