从采购主体完成采购任务的途径来区分,采购方式可分为()。
A.直接采购
B.集中采购
C.分散采购
D.间接采购
E.现货采购
参考答案:A, B
在我校大课间跑操的过程中,若场地是400米的环行跑道,跑十圈和一圈相比( )
A.路程相同
B.位移相同
C.路程和位移都相同
D.无法确定
There are many new central leaders in China now, ________ many once worked in the western provinces.
A.in which
B.of whom
C.in whom
D.for whom