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【单选题】
设集合X={1，2，3}，Y={1，2}，S={f|f:X->Y},【图片】是S上的等价关系：对任意的【图片】，【图片】当且仅当【图片】,则【图片】有（）个等价类。A.
1
B.
2
C.
3
D.
4
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【简答题】Translate the sentence. ... they said they liked the idea so much that they’d started opening their regular meetings in much the same way.
【单选题】晓玲性格内向 , 平时不敢同老师讲话,遇到疑难问题也没有勇气求教。偶有一次,她向杨老师求教,杨老师耐心解答了问题,并对她的行为及时给予表扬。经过多次这样的教学交往 . 晓玲学会了主动向老师请教问题。杨老师改变晓玲行为的方法属于:()。( 2016 上)
A.
强化法
B.
自控法
C.
脱敏法
D.
放松法
【单选题】Why did the early settlers use log for building homes?
A.
They liked the look of log homes.
B.
They had easy access to logs.
C.
They were unfamiliar with other building materials,
D.
They wanted to break away from European traditions.
【单选题】They liked the country ______ they are stationed.
A.
where
B.
which
C.
in which
D.
what
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