语言发展关键期是（）
A.0～1岁
B.1～3岁
C.3～7岁
D.7～11岁
E.11～13，14岁
参考答案：B
—I heard Jeremy Lin was badly hurt during the basketball match.
— !
A．Well done
B．Don’t mention it
C．I’m sorry to hear that
D．Congratulations
熔硫蒸汽的压力要控制在（）MPa。
A.0.2
B.0.3
C.0.8
D.0.4
