在喷涂硝基漆或其他发挥性、易燃性溶剂稀释的涂料时，严禁使用（）。

阅读理解。

     John lived with her mother when he was young. He didn't know who  his father was.  The woman did

some washing for the rich and could buy only some bread for her son.  So  the  boy  was  short and thin.

     One cold morning there was  much  snow  in  the streets.  A  car knocked  the woman down and the

policemen took her to the hospital. She didn't tell John that his father deserted(遗弃) her before he was

born until she died. She left her son the name and address of his father.

     John found his father, Mr. Brown, in another city. He was one of the richest shopkeepers and he had

to receive his son.  From  then  on  the boy lived a rich life.  He ate all kinds of  deliciou s food and wore

beautiful clothes. But he didn't go to school and could not read or write.

     Once his father took him to a party, he  saw  a  newspaper lying  on  the floor and picked it up while

others were talking about a film. He had a look at it and found  a  car's  wheels were upward,  he called

out, "Oh, dear! An accident happened!"

     All the people were surprised and began to read the newspaper. But soon they all began to laugh. Do

you know why?

1. John didn't know his father because ____________.

A. the man was rich                    

B. the man deserted his mother

C. his mother left the man              

D. the man didn't like him

2. John was short and thin because ______________.

A. he didn't like sports                  

B. his parents were short too

C. he was often hungry when he was young  

D. his mother never gave him food

3. The woman told John who his father was ______________.

A. after she was knocked down by a car    

B. before her son left

C. before she was in hospital            

D. before she died

4. After John found his father, __________.

A. he was angry with the man            

B. he started a rich life

C. he wouldn't live with him            

D. the man was bad to him

5. The people at the party laughed at him because____________.

A. he held the newspaper upside down    

B. he wasn't polite

C. the newspaper was yesterday's        

D. he wasn't clever  

压榨酵母

类风湿关节炎的辅助检查，特异性较大的是（）。

A.血沉增快

B.类风湿因子阳性

C.抗核抗体阳性

D.X线显示关节间隙狭窄、畸形

E.狼疮细胞阳性

简述细胞骨架的分类及其生物学功能。

在窗体上有一个名称为CommonDialog1的通用对话框和一个名称为Command1的命令按钮，以及其他一些控件。要求在程序运行时，单击Command1按钮，则显示打开文件对话框，并在选择或输入了一个文件名后，就可以打开该文件。以下是Command1_Click事件过程的两种算法。
算法1：
Private Sub Command1_Click()
CommonDialog1.ShowOpen
Open CommonDialog1.FileName For Input As#1
End Sub
算法2：
Private Sub Command1_Click()
CommonDialog1.ShowOpen
If CommonDialog1.FileName＜＞" "Then
Open CommonDialog1.FileName For Input As#1
End If
End Sub
下面关于这两种算法的叙述，正确的是______。

A) 显示打开文件对话框后若未选择或输入任何文件名，则算法2出错，算法1不会
B) 显示打开文件对话框后若未选择或输入任何文件名，则算法1出错，算法2不会
C) 两种算法的执行结果完全一样
D) 算法1允许输入的文件名中含有空格，而算法2不允许