碳素钢管管材的热线膨胀系数约为（）mm/（m℃）。
A.0.010
B.0.012
C.0.015
D.0.020
参考答案：B
-Would you like me to go together with you?
-Yes, _________.
A．I’d like to
B．I’d like
C．please do
D．I like it very much
从一个不透明的口袋中摸出红球的概率为1/5,已知袋中红球有3个,则袋中共有除颜色外完全相同的球的个数为( ).
A．5个
B．15个
C．10个
D．8个
