在细胞呼吸过程中有CO2放出时,则可判断此过程[ ]
A.是厌氧呼吸
B.是有氧呼吸
C.不是乳酸发酵
D.不是酒精发酵
答案:C
We _______ six days a week, but we only work five days now.
A.usedtowork
B.usedwork
C.usedtoworking
D.usetowork
一般来说,股权乘数越高,银行资本利润率也就越高。( )