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【单选题】
________在公元前5世纪就发现人有不同的气质,并把人的气质划分为四种不同的类型。A.
B.
弗洛伊德
C.
巴普洛夫
D.
希波克拉底
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【简答题】已知二级平行轴斜齿轮传递运动和动力,主动轮1的转向和轮齿螺旋线方向如图所示。 斜齿轮3的螺旋线方向应为()旋(填左/右), 斜齿轮4的螺旋线方向应为()旋(填左/右),才能使中间轴II上齿轮2和3的轴向力方向相反。
【简答题】Peter is a student. He usually goes to school on a bus. This morning, He takes a taxi with his father because he may be late for school. His mother gives him a banana when they go out. On the way, he ...
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【简答题】听短文，选择正确答案。短文读两遍。 1. Tom went to visit his uncle with _____. A. his mother B. his father C. his sister 2. They went there _____. A. by bike B. on foot C. by bus 3. His uncle's home is _____ their home...
【简答题】Sara is in his father’s car .
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