抓铲挖土机的挖土特点是( )。
A．后退向下，强制切土
B．后退向下，自重切土
C．直上直下，自重切土
D．前进向上，强制切土
参考答案：C
Could you tell me how ______ his work without any help every day? [ ]
A. he finishes
B. does he finish
C. he finished
D. did he finish
一般来说，处于启动期与处于衰退期的行业面临的风险都比较高，银行可以进行长期贷款，以获得高风险下的更高收益。()
