单选题：Very often landlords don’t return tenants’ deposits on the p

题目分类：英语六级
题目类型：单选题
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题目内容：

Very often landlords don’t return tenants’ deposits on the pretext that（　）. A．their rent has not been paid in time
B．there has been ordinary wear and tear
C．tenants have done damage to the house
D．the 30-day notice for moving out is over

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答案解析：

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在等容舒张期，心脏各瓣膜的功能状态是（　　）A．房室瓣关闭，动脉瓣开放 B．房室瓣开放，动脉瓣关闭 C．房室瓣关闭，动脉瓣关闭 D．房室瓣开放，动脉瓣开放 E．

分类：英语六级题型：单选题