钢筋的型号是以( )表示的。
A．外径
B．内径
C．计算直径
D．平均直径
参考答案：C
解析：钢筋的型号是以计算直径(mm)表示的。
—If you’re free tonight, how about having dinner together?
— .
A．It doesn’t matter
B．That’s all right
C．All right
D．Not at all
Knowledge and learning are important if we want to be successful, but they may also ______ our
thinking. [ ]
A. direct
B. limit
C. change
D. improve
