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阵发性睡眠性血红蛋白尿溶血检查，血清游离血红蛋升高，结合珠蛋白降低，提示存在

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第三节短文理解2
阅读下列短文，从[A]、[B]、[C]三个选项中选择一个正确答案。
A few weeks ago, we decided to paint (油漆) the outside of our house. To save money, we decided to do it ourselves. On Saturday morning, we went to the shops and bought some paint and a number of brushes. We already had a ladder (梯子), so we were then ready to start. We began that afternoon with the back of the house. The next Saturday I went to a football match while my wife painted the front of the house. On Sunday we found that we could not open any of the front windows. We got them all open in the end but I broke three and they were very expensive to repair. Next time when we try to save money, I shall certainly pay someone to do the work.
Why did the writer and his wife decide to paint the house themselves？ Because ______ .

A. no one else could do the work.
B. they didn't want to spend much money.
C. they only need to buy some paint.

用网喷混凝土加固基坑壁施工时，应优先选用硅酸盐或普通硅酸盐水泥，也可选用矿渣或火山灰硅酸盐水泥，水泥强度等级不应低于()。

A. 25
B. 30
C. 32.5
D. 35

He bought a birthday present from his mother.

A. Right.
B. Wrong.
C. Doesn't say.

His mother liked the bird very much.

A. Right.
B. Wrong.
C. Doesn't say.