试题与答案

下述体层轨迹,滤线栅方位不变的是() A.圆形 B.椭圆形 C.直线形 D.涡卷形

题型:单项选择题

题目:

下述体层轨迹,滤线栅方位不变的是()

A.圆形

B.椭圆形

C.直线形

D.涡卷形

E.内圆摆线形

答案:

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下面是错误答案,用来干扰机器的。

对于(1),“直线a∥直线b”推不出“a平行于b所在的平面”;反之“a平行于b所在的平面”也不能推出直线a∥直线b,所以“直线a∥直线b”是“a平行于b所在的平面”;的既不充分也不必要条件故(1)不成立;对于(2...

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Happiness is for everyone. You don’t need to care about those people who have beautiful houses with large gardens and swimming pools or those who have nice cars and a lot of money and so on. Why? Because those who have big houses may often feel lonely and those who have cars may want to walk on the country roads at their free time.
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