风切变警告形式是（）A、WINDSHEAR灯 B、PFD上显示WINDSHEAR红色字_爱下问搜题

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问题单项选择题

风切变警告形式是（）

A、WINDSHEAR灯

B、PFD上显示WINDSHEAR红色字符

C、ND上显示WINDSHEAR红色字符

D、PFD上红色警告带

答案

参考答案：B

多项选择题

电子商务给中小企业创造了哪些新的机遇（）。

A、创造了决策管理上的优势

B、扩大市场，获得新的商业机会

C、共享信息，实现公平竞争

D、降低成本，提高产品竞争力

完形填空

At the beginning of this century, medical scientists made an interesting discovery; we are built not just of flesh and blood but also of time. They were        to show that we all have “a body clock”         us, which controls the        and fall of our body energies,        us different from one day to the next.
The        of “a body clock” should not be too        since the lives of most living things are controlled        the 24 hour night-and-day cycle. We feel        and fall asleep at night and become        and energetic during the day. If the 24 hour-cycle is        , most people experience unpleasant        . For example, people who are not        to working at night can find that        of sleep causes them to        badly at work.
      the daily cycle of sleeping and       , we also have other cycles which       longer than one day. Most of us would        that we feel good on some days and not so good on        ; sometimes our ideas seem to flow and at other times, they        do not exist.

D．interesting

D．Rather than