提高带式输送机传动滚筒传动能力的措施有()、()和()。
参考答案:增大胶带张紧力、增大围包角、增加摩擦因数
“拜占庭灭亡时抢救出的手稿,罗马废墟中挖掘出的古典雕像,在惊讶的西方面前展示了一个新世界——古代希腊;在它光辉的形象面前,_____的幽灵消失了;_____出现了出人意料的艺术繁荣,这种繁荣好像是古代时代的反照,以后就再也不曾达到过。”引文中的两个空缺应该是: [ ]
A、古代,埃及
B、古代,法兰西
C、中世纪,中世纪
D、中世纪,意大利
(),we would have finished it then.
A.If had we had better equipment
B.Had we had better equipment
C.Had had we better equipment
D.We had had better equipment