已知a=log20.3，b=20.1，c=0.21.3，则a，b，c的大小关系是_爱下问搜题

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问题选择题

已知a=log₂0.3，b=2^0.1，c=0.2^1.3，则a，b，c的大小关系是[ ]

A.a＜b＜c

B.c＜a＜b

C.a＜c＜d

D.b＜c＜a

答案

答案：C

补全对话，情景问答

给下列的问句选择合适的答语。

( ) 1. What do you do on weekends?
( ) 2. What do we have on Mondays?
( ) 3. What day is it today?
( ) 4. What class do you like?
( ) 5. I do my homework on Sundays. What about you?

A. I often play ping-pong.
B. We have art class.
C. I like P. E.
D. I do my homework, too.
E. It's Thursday.

单项选择题

在工业生产中，为满足生产工艺的要求，常常需将固体原料、产品进行筛选，以选取符合工艺要求的粒度，这一操作过程称为( )。

A．过滤

B．筛分

C．分层

D．蒸馏