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
