以下程序中，能够通过调用函数fun，使main函数中的指针变量p指向一个合法的整型单

发布时间：2017-06-16 23:55 │ 来源：www.tikuol.com

题型：单项选择题

问题：

以下程序中，能够通过调用函数fun，使main函数中的指针变量p指向一个合法的整型单元的是（）。

A．main(　)　　{　int　*p; 　　　fun(p);　　　　　┆　　}　　int fun(int　*p)　　{　int s; p=&s;}

B．main(　)　　{　int　*p;　　　fun(&p);　　　　　┆　　} 　　int fun(int　**p) 　　{　int　s; *p=&s;}

C． #include＜stdlib.h＞　　main(　) 　　{　int　*p;　　　fun(&p);　　　　　┆　　}　　int fun(int　**p)　　{　*p=(int*)malloc(2);}

D．#include＜stdlib.h＞　　main(　)　　{　int　*p;　　　fun(p);　　　　　┆　　}　　　int fun(int　*p)　　{　p=(int*)malloc(sizeof(int));}

考点：计算机等级考试 C语言国家计算机二级(C)89

题型：单项选择题

（）属于会计人员办理会计工作交接前的准备工作。

A.编制移交清册

B.移交

C.监交

D.签名并盖章

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题型：单项选择题

In a small open courtyard, outside a school building, there were flowers here and there. In the sunshine，a        was lying on the grass，reading a book with        concentration. Near her，another child was carefully watering the flowers, while a third was        with his back against a tree and had a        on his knees. He appeared to be drawing or writing something on it. He was       in his task, like the first child.
      the building, there were pleasant carpeted areas. Many children were busy with their tasks in a variety of        while teachers wandered among them, talking to them,        them, and encouraging their efforts.
      I watched this scene on a morning in May years ago, it        to me that a visitor here would        have thought he had entered a formal school. He would have been even more      if he had been told that the children he was        came from different kinds of academic levels.
That        has been staying with me ever since. I have been        about some problems. Why in many schools are our children        asked to acquire skills in a way        from a real-life context（情境）? Why does a        school child so often become a defeated school failure?
Developmental psychologist Margaret Donald once said, “      of the intellectual framework (知识框架) on which we        our teaching is misleading.” In my opinion, a child learns everything in human situation. And if every child could learn in the same way as the children in the school I visited, they would develop better.

A．referring to

C．pointing to

B．disappointed

C．encouraging

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题型：单项选择题

（12分）某兴趣小组为研究乙酸乙酯的制取，进行如下实验。

实验一用乙醇和乙酸制取乙酸乙酯

甲、乙同学分别使用图1、图2装置制取乙酸乙酯。

图1 图2

（1）制取乙酸乙酯的化学方程式为

（2）将饱和碳酸钠溶液换成氢氧化钠溶液是否可行，并解释原因

（3）图1导管末端不能插入饱和碳酸钠溶液，而图2装置中的仪器C的末端可以插入饱和碳酸钠溶液的原因是

实验二测定乙酸乙酯的纯度

取乙同学所得乙酸乙酯样品1.0 g，放入20.00 mL 0.500 mol．L^-1的NaOH溶液中，充分振荡四小时，滴入两滴酚酞后，用0.075 mol·L^-1的盐酸标准溶液滴定，重复三次实验测得盐酸用量的平均值为20.00 mL。

（4）该乙酸乙酯样品的纯度为

（5）达到滴定终点时，溶液颜色由变为

（6）下列操作能引起乙酸乙酯纯度偏低的原因是

A．酸式滴定管未润洗

B．酸式滴定管滴定前有气泡，滴定后气泡消失

C．配制盐酸标准液时，定容俯视

D．乙酸乙酯未完全水解E．乙酸乙酯中含有乙酸 F．锥形瓶未润洗

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题型：单项选择题

压力测量仪表按其转换原理的不同大至可以分为哪几类？

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题型：单项选择题

手电筒电路中，设通过电珠的电流为150毫安，电珠两端的电压为3伏，求电珠耗用的功率。（）

A.1.2瓦

B.0.45瓦

C.1瓦

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