多项选择题

建筑中四口五临边包括（）？

A.楼梯口
B.有安装栏杆的阳台周边
C.无外架防护的层面周边
D.预留洞口
E.沟、坑、槽和深基础周边

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地槽—地台说中地槽是地壳运动强烈，不断下降接受巨厚沉积的巨大坳陷的槽地，后上升形成褶皱带。（）
A、正确
B、错误

答案：正确

单项选择题

“Have you ever been out on a boat and felt it lifted up by a wave? Or have you jumped in the water and felt the rush of energy as waves came over you?” asked Jamie Taylor of the Wave Energy Group at the University of Edinburgh. “There is certainly a lot of energy in waves,” he said.
The writer uses the two questions at the beginning of the passage to ______.
A、test the readers’ knowledge about waves.
B、draw the readers’ attention to the topic.
C、show Jamie Taylor’s importance.
D、invite the readers to answer them.