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【多选题】
机车车辆脱轨事故是铁路运输生产中的典型事故，防止机车车辆脱轨事故的安全措施主要有（）。A.
严格执行行车作业标准化规范
B.
认真落实非正常行车安全措施
C.
加强机车车辆检修和机车出库、车辆列检的检查质量
D.
提高线路道岔养护质量
E.
加强信号机和轨道电路的养护
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举一反三
【单选题】Accidents may occur when people feed cookies and candy to bears because______.
A.
the latter is not only greedy but also unfreindly
B.
the latter may mistake a feeding hand for the offered cookie
C.
the latter is the most ferocious carnivore and they attack humans on sight
D.
.
【单选题】Which of the following statements is NOT TRUE about “The Glass Mountain”?
A.
It refuses to follow the story line of an existing fairy tale.
B.
It shows no trace of anything heroic or romantic.
C.
The author presents a picture of an absurd man doing absurd things .
D.
The story concludes with a happy ending.
【单选题】In winter, traffic accidents occur ______ on the highway.
A.
frequently
B.
suddenly
C.
usually
D.
rapidly
【单选题】Everyone wants to be healthy and happy.【C1】______, ill ness or accidents may occur without any【C2】______. Frequently the person who is【C3】______can be cared for at home if there is someone【C4】______of...
A.
Occasionally
B.
Unfortunately
C.
Miserably
D.
Naturally
【简答题】一个TCP连接的建立,需要由____次“握手”来完成。构成TCP连接的一对套接字,由IP和____组成。
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