在单链表中,增加头结点的目的是 ______。A.方便运算的实现 B.使单链表至少有

题型:单项选择题

问题:

在单链表中,增加头结点的目的是 ______。

A.方便运算的实现

B.使单链表至少有一个结点

C.标识表结点中首结点的位置

D.说明单链表是线性表的链式存储实现

考点:计算机等级考试VISUALFOXPRO二级VISUALFOXPRO笔试
题型:单项选择题

阅读理解。

    Alice is an American girl. She is thirteen. She is now in Beijing with her parents. She doesn't know

much Chinese. She can't speak Chinese well. Sometimes her friends do not understand her.

    It's Sunday morning. She's going to the zoo to see the pandas. She is waiting at the bus station. At the

bus station she asks a boy how to go to the zoo. But the boy can't understand her. Then she takes out

(拿出) a pen and some paper. She draws a panda on it and shows the picture to the boy. The boy

smiles and shows the way to the zoo right now.

1. Alice is in Beijing with her________.

A. brother    

B. sister      

C. uncle    

D. father and mother

2. Alice can speak ________Chinese.

A much      

B. little    

C. few      

D. many

3.  Alice goes to the zoo________.

A. on her bike    

B. on a bus      

C. in a car    

D. on a train

4. Alice is going to the zoo to see________.

A. her friends    

B. the tigers    

C. the monkeys  

D. the pandas

5 .The boy________.

A. shows her the way      

B. doesn't know the way  

C .goes to the zoo with her  

D. gives a map to her

题型:单项选择题

发酵温度控制的主要依据是(),所以在主发酵期间每天必须定时检查

A.糖度下降

B.压力升高

C.CO2饱和

D.pH下降

题型:单项选择题

某矿泉水标签上印有的主要矿物质成分及其含量如下(单位:克/毫升):Ca一20、 K~3、Zn—0.06、F—0.02等,这里的Ca、K、Zn、F是指

A.元素

B.原子

C.单质

D.离子

题型:单项选择题

创新思维的具体方式有许多种,较常用的有()与灵感思维。

A.发散思维

B.立体思维

C.逆向思维

D.质疑思维

题型:单项选择题

机动车通过有交通信号灯控制的交叉路口,应当按照()规定通行。

A.在划有导向车道的路口,按所需行进方向驶入导向车道

B.向左转弯时,靠路口中心右侧转弯,转弯时开启转向灯,夜间行驶开启近光灯

C.货车让校车先行

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