Questions 5 to 7 will be based on News Items 3.[音频]
A. It comprises of four linked solar plants.
B. Its first phase is set to launch next month.
C. It will be built in Morocco's capital city.
D. It will produce roughly 160 MW of electricity.
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6
A gas in its liquid form.
B. Seawater.
C. A special oil.
D. A mixture of a liquid and water.
7
A. Low running costs.
B. Capability of Generating power at nighttime.
C. The environment friendliness.
D. Short construction time.
下列物质:(a)氯苯(b)苯酚(c)苯甲醚(d)硝基苯(e)苯发生亲电取代反应的活性顺序为( )
A. d＞a＞b＞c＞e
B. b＞c＞e＞a＞d
C. e＞d＞c＞b＞a
D. a＞b＞c＞d＞e
有关苯分子中的化学键描述正确的是
A. 每个碳原子的sp2杂化轨道中的其中一个形成大π键
B. 每个碳原子的未参加杂化的2p轨道形成大π键
C. 碳原子的3个sp3杂化轨道与其它形成σ键其余1个sp3杂化轨道形成大π键
D. 碳原子的未参加杂化的2p轨道与其它形成σ键
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