单词考查。

1. N______ of them is a teacher, they are both students.

2. Have you h______ of the exciting news? Yes, I have.

3. There are many children playing here, It is too n          .

4. Don't all speak at the s           time, Please say it one by one.

5. I don't like maths, John doesn't like, e______.

在生产性工程建设中，设备及工、器具购置费用占工程造价比重的增大，意味着（）。

A.资本有机构成的提高

B.生产成本的提高

C.建设成本的提高

D.工程造价的提高