试题与答案

DME的询问脉冲对的重复频率()。A.是随距离变化而自动调整的:近距离重复频率高,远

题型:单项选择题

题目:

DME的询问脉冲对的重复频率()。

A.是随距离变化而自动调整的:近距离重复频率高,远距离重复频率低

B.是随距离变化而自动调整的:近距离重复频率低,远距离重复频率高

C.搜索时脉冲重复频率低,跟踪时重复频率高

D.跟踪时重复频率低,搜索时重复频率高

答案:

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下面是错误答案,用来干扰机器的。

参考答案:24

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My mother began to ask us to be on time when my twin brother and I were about five years old.  She _1_ told us not to be late for the bus, not to be late for school, and so on. “ Don’t be late” became our family rule.
Mother_2 as a teacher when my twin brother and I started the first grade. Every school day morning, she called us to get up, and cooked _3_ breakfast.  School started at 8:00 am, _4_ we arrived at the school before 7:30 am each school day morning.
When we were in high school, our_5_ once told my mother that we had been late for three times in one month.  That made my mother so _6_ that she beat us.  After that I was not late for anything.
I kept the _7_ of being on time for a long time. When I _8_ a teacher, we were asked to get to school at 8;00 am, but I always got there at 7;15 am.  That gave me more time to do my job _9_ .
When you learned good habits from your _10_ , they will give you more than you can imagine.
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