将账簿划分为序时账、分类账、备查账的依据是（）
A.账簿的登记方式
B.账簿的用途
C.账簿登记的内容
D.账簿的外表形式
参考答案：B
— The patient looks much better. ____ is it that has made him ____ he is today?
— Perhaps the special medicine and his family's patient care. [ ]
A. What; that
B. That; that
C. What; what
D. What; which
在无关断信号时，（）关断阀处于正常工作位置
A、切断气源供给
B、切断电源
C、气源供给正常
D、电源闭和
