铝合金的腐蚀剂一般用（）。

阅读短文，判断正误。正确的写“T”，错误的写“F”。

Mr Jones and Mr Brown work in the same office (办公室).One day Mr Jones says to Mr Brown ,

“I will have a small party at our house on Monday evening . Would you and your wife like to

come ?”

Mr Brown says , “Thank you very much . I’d love to , but let me ask my wife first .” 

So Mr Brown goes to the other room and telephones his wife . Then he comes back and looks very

worried .

“What’s the matter?” asks Mr Jones . “Is you wife there at home ?”

“No,” answers Mr Brown . “She isn’t there . My small son answers the telephone . I 

say to him , ‘Is your mother there , David ?’ and he answers ‘No , she isn’t in the

house.’‘Where is she ?’ I ask ,‘She is somewhere outside(在外面) .’‘What’s she doing?’

‘She is looking for me .’”

1．There is a party at Mr Jones’s house on Monday evening . (  )

2．Mr Jones asks Mr Brown and his wife to go to the party . (  )

3．The telephone is in Mr Brown’s office. (  )

4．Mr Brown speaks to Mrs Brown on the telephone . (  )

5．Mrs Brown is looking for her son . (  )

存在于RNA而不存在于DNA，存在于叶绿体而不存在于线粒体，存在于动物细胞而不存在于植物细胞中的糖类物质分别是( )

A．核糖、葡萄糖、糖原
B．脱氧核糖、核糖、纤维素
C．核糖、脱氧核糖、麦芽糖
D．脱氧核糖、葡萄糖、淀粉

提示肾实质病变

A．脂肪管型
B．蜡样管型
C．细胞管型
D．颗粒管型
E．透明管型

下列不属于一对一的精确定位营销的是( )。

A．感觉
B．获得
C．发展
D．保留

碳化塔碳化反应区在碳化塔（）。

A、上部

B、中部

C、下部

D、中下部