下列关于防水涂料，说法不正确的是（）。 A.防水涂料是一种流态

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问题单项选择题

下列关于防水涂料，说法不正确的是（）。

A.防水涂料是一种流态或半流态物质

B.防水涂料可用刷、喷等工艺涂布在基层表面

C.防水涂料不适用于工业与民用建筑工程的地面防潮

D.防水涂料能起到防水、防潮作用

答案

参考答案：C

解析：防水涂料适用于工业与民用建筑工程的屋面防水、地下室防水和地面防潮等。

阅读理解

阅读理解，选择正确的答案。

Mary is a little girl. She is only five years old. She is not at school. She doesn't know how to read or write.

But her sister Joan is a schoolgirl. She is ten. She knows how to read and write.

One day, Joan sees her little sister in the room. She is at the table. There is a pencil in her hand. She is

writing. "What are you writing, Mary?" She asks. "I'm writing to my friend, Rose." "But how can you? You

don't know how to write." Says her sister. "Well," says Mary, "It doesn't matter. Rose doesn't know how to

read, either."

1. Is Mary a schoolgirl?[ ]

A. Yes, she is.

B. No, she isn't.

C. We don't know.

2. Who can read and write?[ ]

A. Mary.

B. Rose.

C. Joan.

3. What's in Mary's hand?[ ]

A. There's a pen.

B. There's a pencil.

C. There's a crayon.

4. What's Mary doing?[ ]

A. She's drawing.

B. She's writing to her friend.

C. She's singing.

5. Can Rose read and write?[ ]

A. No, she can't.

B. Yes, she can.

C. We don't know.

填空题

使用滚动导卫装置可以有效减少钢材表面的（）缺陷。