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问题 单项选择题

以下哪一种陈述是正确的（）.

A.在夜间或边界气象条件下，由于视觉线索很少，飞行员可依靠前庭觉和运动觉来进行空间定向；

B.在夜间或边界气象条件下，飞行员应根据仪表信息来进行空间定向；

C.在夜间或边界气象条件下，由于视觉线索很少，飞行员应根据航管员的指示来进行空间定向。

答案

参考答案：B

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       My name is Bill. I’m   1   American boy. I’m twelve. I’m a student of a middle school. I’m
in Class 4, Grade 1.   2   44 students in our class.Li Lei is my friend. We are in the same class. He is
eleven. Here’s a picture of   3   family.   4   look at it. The policeman on the chair is his father. His
mother is a teacher of Chinese. These are his twin sisters. They have a cat.   5   name is Mimi. Look!
It’s   6   the floor under the table.   7   twins are middle school students, too. They are in the    8   class. How many   9   students are there in their class? There is only   10  .
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单项选择题

反应速率与反应物浓度的一次方成正比的为（）

A.伪一级反应

B.零级反应

C.一级反应

D.二级反应

E.A和C
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