碾压机械的开行方式通常有( )。
A.环行路线
B.进退错距法
C.圈转套压法
D.大环行路线法
E.8字形路线法
参考答案:B,C
温度对中变催化剂活性的影响?
The research report published last month is very important______ it confirms the link between aggression and alcohol.
A.as long as
B.in case
C.in that
D.even though