齿轮齿条式动力转向系中动力缸与控制阀间有()条油管相连。
A.一条;
B.两条;
C.三条;
D.四条。
参考答案:B
进度计划体系的第二级计划是指( )。
A.项目进度计划 B.各专业工程进度计划C.项目短周期工程综合进度计划 D.项目进度调整计划
The flight was put off due to the typhoon. Otherwise, we______ the beautiful scenery in Greece now.
A.would be enjoying
B.would have enjoyed
C.will enjoy
D.must have enjoyed