钢轨焊后打磨时,不允许横向打磨,母材打磨深度不能超过()mm。
A.0.1
B.0.5
C.1.0
D.5.0
参考答案:B
隐形义齿的组成部分不包括()
A.人工牙
B.牙合支托
C.卡环
D.基托
E.连接体
According to the government, the new tax law will not ________until next month.
A.take effect
B.bring into effect
C.carry into effect
D.be for effect