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问题 选择题

下面各正多边形中，不能够单独铺满地面的是

A．正三角形

B．正方形

C．正六边形

D．正七边形

答案

答案：D

A、正三角形的每个内角是60°，能整除360°，能密铺；

B、正方形的每个内角是90°，4个能密铺；

C、正六边形的每个内角是120°，能整除360°，能密铺；

D、正七边形每个内角是180°-360°÷7≈129°，不能整除360°，不能密铺．故选C．

阅读理解

A Frenchman went to a small Italian town and was staying with his wife at the best hotel there. One night, he went out for a walk alone. It was late and the small street was dark and quiet. Suddenly he felt someone behind him. He turned his head and saw an Italian young man who quickly walked past him. The man was nearly out of sight when the Frenchman suddenly found that his watch was gone. He thought that it must be the Italian who had taken his watch. He decided to follow him and get back the watch.

　　Soon the Frenchman caught up with the Italian. Neither of them understood the other's language. The Frenchman frightened the Italian with his fist(拳头) and pointed at the Italian's watch. In the end the Italian gave up his watch to the Frenchman.

　　When he returned to the hotel, the Frenchman told his wife what had happened. He was greatly surprised when his wife pointed to the watch on the table. Now he realized that by mistake he had robbed the watch and it was the Italian's.

小题1:The Frenchman went to a small Italian town _______.

A．alone

B．with his wife

C．with his friend

D．with an Italian小题2:The Italian gave up his watch to him at last because ________.

A．he had stolen the watch from the Frenchman.

B．he understood what the Frenchman wanted

C．he had picked up the watch on his w ay from work

D．he was afraid of the Frenchman小题3:Who was robbed of the watch on earth?

A．The Frenchman was.

B．The Italian was.

C．Both of them were.

D．Neither of them was.
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单项选择题

在下列处所中，在（）禁止卸车。①无碴桥；②有碴桥；③道口；④道岔；⑤已卸下大堆料的处所。

A.①③④⑤；

B.③④⑤；

C.②③④⑤；

D.①②③④⑤。
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