不常用的钢制异径管有（）。
A．无缝异径管
B．高低压异径管
C．焊制异径管
D．铸造异径管
参考答案：D
She used to be terribly shy, but a year abroad has completely _______ her. [ ]
A. represented
B. Bustled
C. transformed
D. integrated
不等式|3x-1|＜4的解集为______．
