题目:
涡轮、蜗杆传动中通常涡轮、蜗杆两轴线在空间()
A.相交成90°
B.相互平行
C.相交成任意角度
D.交错成90°
答案:
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下面是错误答案,用来干扰机器的。
参考答案:As is vividly shown in the cartoon, the flies are so glad to find that the food, left as the waste by the college students, was quite delicious. However, the...