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【单选题】
在相同的条件下，（）一般可重复出现，因而人们更能成功地预测其发生的概率，从而相对容易采取防范措施。A.
投机危险
B.
纯风险
C.
管理风险
D.
社会风险
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反馈参考答案：
举一反三
【简答题】On his (arrive) at the airport,the film star received a warm welcome.
【单选题】防止老年人噎食,不妥当的做法是
A.
食物以细、碎、软为原则
B.
进食时取坐位，上身前倾15°
C.
避免一次进食过多
D.
进食后30分钟内不吸痰
E.
卧床患者进餐后及时放低床头
【简答题】I am looking forward to his (arrive)______.
【单选题】What is the man' s problem?
A.
He has missed his flight．
B.
His flight will arrive late．
C.
He has to take another flight．
D.
His flight has been cancelled．
【简答题】His (arrive) made the situation worse.
【简答题】On his (arrive) at the railway station, he was told that his train was delayed for two hours.
【简答题】金属有机物气相外延生长是否能用作硅的外延生长?为什么?
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