搜题请搜索小程序“爱下问搜题”
问题
判断题
有效断面可以是平面也可以是曲面。
答案
参考答案：
对
选择题
Recently I bought an ancient Chinese vase (花瓶), _____ was very reasonable.
A. which price
B. the price of which
C. its price
D. the price of whose
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判断题
贝克的认知疗法一般需要5～10次诊疗。 ( )
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