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【判断题】
碳酸盐热稳定性的一般规律为:碳酸<碳酸氢盐<碳酸盐;在碳酸盐中,铵盐<过渡金属盐<碱土金属盐<碱金属盐。A.
正确
B.
错误
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【单选题】听力原文：W: What do you use your computer for? M: At the moment, I’m preparing a presentation for a client, but I must admit to playing games on it too from time to time! Q: What do we know for sure about...
A.
He is using his computer for work purposes.
B.
He often plays games on his computer.
C.
His computer makes his life easier.
D.
His client cannot use a computer.
【简答题】drink的一般过去时形式为A. drank
【单选题】在生产力不发达的时代，战争成为争夺资源的最重要的方式。青年是战争中最重要的参与者，而要赢得战争的胜利，青年人必须有强健的身体素质。为了取得战争的胜利，各城邦青年组织起来进行训练。作为全希腊的盟主，雅典城邦在全盛期有25万人口。而同时期的科林斯有9万人口，有些城邦只有5000人甚至更少。人口越多，青年的比重越高，城邦越是能够在竞争中居于优势地位。这段文字强调了，在生产力不发达的时代（）
A.
青年在竞争中起着重要作用
B.
获取资源主要依靠战争方式
C.
人口多寡是衡量城市发展的指标
D.
竞争主要依赖人们的身体素质
【单选题】听力原文：W: What do you use your computer for? M: At the moment, I'm preparing a presentation for a client, but I must admit to playing games on it too from time to time! Q: What do we know for sure about...
A.
He is using his computer for work purposes.
B.
He often plays games on his computer.
C.
His computer makes his life easier.
D.
His client cannot use a computer.
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