建立资金归集关系由省级清算中心操作,必须遵循()的原则,即先建立()级账户,然后逐级()建立。
A.自下而上最下向高
B.自上而下最高向下
C.自上而下最下向下
参考答案:B
世界上第一台电子计算机诞生于( )年。
A.1939
B.1946
C.1952
D.1958
–Did you _____ your sister when you were in Shanghai?
--No. But I _____ my uncle’s during my stay there.
A.call on, called on
B.call at, called at
C.call on, called at
D.call at, called on