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问题 选择题

下列气体与空气混合后遇明火，可能发生爆炸的是（  ）

A．甲烷

B．二氧化碳

C．一氧化碳

D．氮气

答案

AC

当可燃性气体中混有的空气达到一定浓度遇到明火会发生爆炸

由选项知只有甲烷和一氧化碳具有可燃性。

故选AC

阅读理解

阅读再判断正误。

It’s 5:30 in the afternoon. School is over. It’s time for student to relax.

Look! Some boys are playing soccer and some are playing basketball on the playground(操场). Most girls don’t like ball games because they think they are boring. They like to do other sports, such as swimming and dancing. Look, some girls are swimming in a big swimming pool. In the gym(健身馆), Maria and her friends are dancing to the music. Some students are singing together in the classroom building. Who are they? Oh, they are some students of Class Four. They are cleaning their classroom now. After that, they can play with other students.

根据上面内容判断正误，正确的写T， 错误的写F。

小题1: After 5:30pm, the students don’t have classes.

小题2: On the playground, some boys are playing basketball and soccer.

小题3:We can’t see any students swimming in the pool now.

小题4: Some students from Class Four are singing together in the classroom.

小题5: Maria is dancing on the playground.
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单项选择题

保险合同是投保人支付保险费给保险人，保险人在保险标的发生约定事故时承担经济损失补偿责任。可见保险合同是我们理赔时的主要依据，所以理财规划师要熟练掌握保险合同的知识。请根据对保险合同的认识解答下列问题：

保险合同( )的变更主要是指保险标的的种类、数量的变化从而导致保险标的价值的增减变化，引起保险利益的变化，进而需要变更以获得足够的保险保障。

A．主体

B．客体

C．条款

D．情况
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