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问题 单项选择题

下列不属于Java关键字的是

A．this

B．super

C．finally

D．NULL

答案

参考答案：D

解析： Java的关键字中不包含NULL，它是C语言的关键字，表示空。

单项选择题

C

On Christmas Eve—the night before Christmas Day—children all over Britain put a stocking at the end of their beds before they go to sleep. Their parents usually tell them that Father Christmas will come during the night.

Father Christmas is very kind-hearted. He gets to the top of each house and climbs down the chimney into the fireplace. He fills each of the stockings with Christmas presents.

Of course, Father Christmas isn’t real. In Jim and Kate’s house, "Father Christmas" is really Mr. Green. Mr. Green doesn’t climb down the chimney. He waits until the children are asleep. Then he quietly goes into their bedrooms and fills their stockings with small presents. When they were very young, Mr. Green sometimes wore a red coat. But he doesn’t do that now. The children are no longer young, and they know who "Father Christmas" really is. But they still put their stockings at the end of their beds.

Christmas Eve is （）.

A．the night of Christmas Day

B．the evening of Christmas Day

C．Christmas Day

D．the night before Christmas Day
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单项选择题 B1型题

广藿香抗真菌的成分是（）

A.穿心莲内酯

B.盐酸水苏碱

C.槲皮素

D.广藿香酮

E.百秋李醇
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