有如下类定义: class Animal{ public:virtual void

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问题:

有如下类定义: class Animal{ public:virtual void Name()=0; }; class Koala:public Animal{ public:void Name(){/*函数体略*/} };关于上述类定义,下列描述中错误的是

A.类Koala是类Animal的派生类

B.类Koala中的Name函数是一个虚函数

C.类Animal中的Name函数是一个纯虚函数

D.语句"Animal a;"能够建立类Animal的一个对象a

考点:计算机等级考试C++全国计算机等级考试二级C++模拟题二2012年3月
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金属Ni、Mn分别放入其他三种金属X、Y、Z的盐溶液中,反应的结果和有无金属析出的情况如下表所示。

它们的金属活动性由强到弱的顺序为 [ ]

A.X Mn Y Ni Z

B.Z Ni Y Mn X

C.Z Mn Y Ni X

D.X Mn Ni Y Z

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In the days when an ice cream sundae cost much less, a 10-year-old boy entered a hotel coffee shop and sat at a table. A waitress put a glass of water in front of him. “How much is an ice cream sundae?” “Fifty cents,” replied the waitress. The little boy pulled his hand out of his pocket and studied a number of coins in it. “How much is a dish of plain ice cream?” he required. Some people were now waiting for a table and the waitress was a bit impatient. “Thirty-five cents,” she said rudely. The little boy again counted the coins. “I’ll have the plain ice cream,” he said. The waitress brought the ice cream, put the bill on the table and walked away. The boy finished the ice cream, paid the bill and departed. When the waitress  came back, she began wiping down the table and then swallowed hard at what she saw. There, placed nearly beside the empty dish, were two five-cent coins and five one-cent coins---her tip.

1. In the days , an ice cream is ______________.

A. dearer than usual                B. as dear as usual

C. much cheaper than usual          D. as cheap as usual

2.How much money did the boy probably have in his pocket?

A. thirty-five cents.      B. More than fifty cents. 

C. only fifty cents.       D. Less than fifty cents.

3.Why did the little boy have only a dish of plain ice cream?

A.The plain ice cream cost him much less.

B.He enjoyed the cheaper ice cream better.

C.The coins were not enough for an ice cream sundae.

D.  He wanted to save some coins to tip the waitress.

4.We can infer that the waitress might have felt _____ when she got the tip.

A. very surprised.                B. a bit of shame

C. quite pleased                  D. a little worried

题型:单项选择题

药物经动脉注入血管后,下列叙述中正确的是()。

A.能够很快和血液混合均匀

B.药物能在血柱的上层流动

C.药物能在血柱的下层流动

D.药物能在血柱的中层流动

E.患者卧位时,药物优先进入向背侧开口的血管分支

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该图中心为极点,外圆为50°纬线图,图中数字表示经度度数,P、Q之间和M、N之间为陆地,完成问题。

P点附近的盛行风向是()

A.东北风

B.西南风

C.西北风

D.东南风

题型:单项选择题

上消化道出血可出现()

A.脓血便

B.鲜血便

C.柏油样便

D.白陶土样便

E.稀糊状便

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