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【单选题】
听力原文：W: Has your brother bought this book yet? M: He bought a history book,but the English textbook was sold out. Q: Which book has the man's brother got? (5)A.
An English textbook.
B.
A Chinese textbook.
C.
A chemistry book.
D.
A history book.
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举一反三
【单选题】What is implied by the last sentence of the passage 'And finding that convertible will be much easier'?
A.
It will be much easier to search a convertible automobile on line than now.
B.
It will be easier for the 'semantic Web' to add descriptive tags to Web content.
C.
It will be easier to turn all of cyberspace into a unified interactive computer.
D.
It is easy to find the changeable shift of the Internet into a unified interactive computer.
【单选题】下列叙述中正确的是( )
A.
因为p轨道是“８”字形的，所以p电子走“８”字形
B.
主量子数为２时，有２s、２p两个轨道
C.
氢原子中只有一个电子，故氢原子只有一个轨道
D.
电子云是波函数┃ф┃2在空间分布的图像
【单选题】下列叙述中正确的是......... ( )
A.
在 分子中，C与C之间有一个 键和两个 键，性质活泼；在 分子中，N 与N之间也有一个 键和两个 键，故 分子也活泼
B.
Be原子的外电子层构型为 ，激发一个电子到2p轨道上，就有可能形成 分子
C.
C原子和O原子的外层电子构型分别为 ，都有两个未成对电子所以 CO分子中存在一个 键和一个 键
D.
He原子的电子构型为 ，因此两个He原子不能形成 分子
【单选题】What is the implied message of the author?
A.
[A]Web connections aid our memory.
B.
People differ in what to remember.
C.
People need to exercise their memory.
D.
People keep memory on smart phones.
【单选题】What is implied by the mention of Scott， Poe and Hawthorne? 查看材料
A.
Irving enjoyed great popular admiration.
B.
Scott， Poe and Hawthorne were primarily responsible forIrving’s success.
C.
Irving’s work was not only popular， but also of highliterary quality.
D.
More Americans than Britons admired Irving.
【简答题】什么是随机误差?它有什么特点?
【简答题】在密闭容器中进行下列反应：M（g）+N（g）?R（g）+2L（？），反应符合如图所示的图象．下列叙述正确的是（ ） A．T 2 ＜T 1 ，正反应放热，L是气体 B．T 2 ＞T 1 ，正反应放热，L是液体 C．P 2 ＜P 1 ，正反应吸热，L是固体 D．P 2 ＞P 1 ，正反应吸热，L是气体
【单选题】In choosing a firewall product, what is implied as the main concern of the author?
A.
Management.
B.
Transparency.
C.
Independence.
D.
Efficiency.
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