【单选题】
当在山谷、山脊或山区作低空飞行时，在什么时候最容易碰到乱流造成的危险：___
A. 在山的背风面顺风飞行
B. 在山的背风面逆风飞行
C. 在山的迎风面逆风飞行
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答案
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【单选题】
飞机在着陆时遇到顺风切变，会出现下述何种现象：___
A. 飞机空速突然增大，升力增加，飞机抬升
B. 飞机高度下降，空速增大，超过正常着陆点着陆
C. 飞机空速突然减小，升力减小，飞机将掉至正常下滑线以下
【单选题】
飞机在着陆时突然遇到逆风切变，会出现下述何种现象：___
A. 飞机空速突然增大，升力增加，飞机上仰并上升到下滑线之上
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C. 飞机空速突然减小，升力减小，飞机将掉至正常下滑线以下
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能够产生有一定影响的低空风切变的天气背景主要有三类：___
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【单选题】
风切变气流常从高空急速下冲，像向下倾泻的巨型水龙头，当飞机进入该区域时：___
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【单选题】
和地面建筑物有关的湍流强度依赖于，这会影响任何飞机的起飞和着陆性能，也会引发非常严重的危险。___
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【单选题】
雷暴是由强烈的积雨云产生的，形成强烈的积雨云需要三个条件：___
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C. 强大的风力、充沛的水气、足够的冲击力
【单选题】
卫星云图上下列哪个不是中云特征：___
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【单选题】
卫星云图上下列哪个不是积雨云特征：___
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【单选题】
卫星云图上下列哪个不是层云（雾）特征：___
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【单选题】
锋是三度空间的天气系统。锋的宽度同气团宽度相比显得很狭窄，因而常把锋区看成一个几何面，称为锋面。下面描述错误的是：___
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