同时对两处的压力都调节时,最常用的是改变()。
A、各滚筒间的中心距;
B、橡皮滚筒下面的衬垫厚度;
C、各个滚筒下面的衬垫厚度;
D、印版滚筒下面的衬垫厚度
参考答案:B
1799年法国雾月 * * 成功的主要原因是
A.督政府腐败懦弱且
B.拿破仑享有很高威望
C.混乱中的法国需要独裁者稳定秩序
D.得到外国势力支持
If he had been wise he _____ his business and turned it over to someone else. [ ]
A. had stopped
B. have stopped
C. would have stopped
D. would stop