问题 单项选择题

当基体含水率不超过8%时,可宣接在水泥砂浆和混凝土基层上进行涂饰的是()涂料。

A.过氯乙烯 

B.苯一丙乳胶漆 

C.乙一丙乳胶漆 

D.丙烯酸酯

答案

参考答案:D

解析:丙稀酸酯外墙涂料的特点:良好的抗老化性、保光性、保色性、不粉化、附着力强,施工温度范围,(0℃以下仍可干燥成膜)。但该种涂料耐玷污性较差,因此,常利用其与其他树脂能良好相混溶的特点,将聚氨酯、聚酯或有机硅对其改性制得丙烯酸酯复合型耐玷污性外墙涂料,综合性能大大改善,得到广泛应用。施工时基体含水率不应超过8%,可以直接在水泥砂浆和混凝土基层上进行涂饰。考点 建筑装饰装修材料的特性与应用

阅读理解

阅读理解。

     One day a farmer went out for a walk  with  his  daughter. The farmer put on a pair of wrong shoes

one with a thick sole (鞋底)  and the other  with  a  thin  one. So  as  he  began  to  walk, he  felt very

uncomfortable. When he was just out of the house, he  turned  to  his  daughter and said, "Why should

one of my legs be longer than the other today?"

     The daughter looked at his father's legs carefully as he  was  walking, and  then  laughed, "Oh,  no,

Daddy, your legs are all right. You have put on the wrong shoes."

     The farmer was very happy to hear that and said to himself, "What  a  clever  daughter  I  have got!"

Then he asked his daughter to go back and get the other pair of shoes for him.

     The farmer had only two pairs of shoes.

     When the daughter ran back to the house, she found  that  the  other pair was also  a  pair of wrong

shoes.

     She had to return to his father with nothing in her hands and said out of breath, "It's no use changing

them, Daddy! The shoes at home were not a pair, either!"

1. When the farmer went out for a walk with his daughter, he put on a pair of ____ shoes.                     

A. wrong  

B. comfortable    

C. old      

D. new

2. A pair of wrong shoes means ________.

A. the shoes are not the farmer's

B. the shoes are too small

C. one of the shoes has a thick sole, the other has a thin one, they are not a pair

D. the shoes are too big          

3. When the farmer began to walk, he felt very uncomfortable because ________.

A. one of his legs was longer than the other one

B. he was ill that day

C. he wore a pair of wrong shoes

D. the shoes were too small

4. The farmer thought his daughter was a clever girl because ________.

A. she could make shoes

B. she could find out that her father wore a pair of wrong shoes

C. she could find out a pair of right shoes

D. she found that her father's legs were sick

5. The father asked his daughter to go and get the other pair of shoes for him and the daughter ____. 

A. brought back a pair of wrong shoes

B. brought back a pair of right shoes

C. didn't bring any shoes; she knew the other pair at home was not a pair, either

D. couldn't find anything at home

单项选择题