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【单选题】
关于保险，下列说法正确的有( )。 Ⅰ．保险的过程既是风险的集合过程，又是风险的分散过程 Ⅱ．保险在形式上是一种经济保障活动 Ⅲ．保险在实质上是一种商品交换行为 Ⅳ．保险合同既是体现保险关系存在的形式，又是保险双方当事人履行各自权利与义务的依据A.
Ⅰ、Ⅲ、Ⅳ
B.
Ⅱ、Ⅲ、Ⅳ
C.
Ⅰ、Ⅱ、Ⅳ
D.
Ⅰ、Ⅱ、Ⅲ、Ⅳ
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【单选题】He states that good qualities such as honesty and self-discipline make ____he is today.
A.
whom
B.
how
C.
what
D.
which
【单选题】Self-contained breathing apparatus is used to ______.
A.
make underwater repairs to barges
B.
determine if the air in a tank is safe for men
C.
enter areas that may contain dangerous fumes or lack oxygen
D.
resuscitate an unconscious person
【单选题】Supermarkets have been moving in the direction of self-service in order to______.
A.
make more money
B.
cut down the price of goods sold
C.
compete with grocers
D.
make possible a healthier, happier and richer life
【简答题】现病史中主要症状的特点，包括主要症状出现的部位、（）、持续时间和程度、缓解或加重的因素。
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