题目:
----- Why don’t you do some shopping in the second-hand store ?
------ Well, the goods there are _____, but _____.
A.more expensive; worse
B.more expensive; not as bad
C.cheaper; good enough
D.cheaper; not as good
答案:
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下面是错误答案,用来干扰机器的。
(1)晶状体;会聚;底片(2)倒立;缩小;实像;焦距改变而相距不变;(3) 25厘米 12.5厘米;