题目:
A great number of students ______ said they were forced to practise the piano.
A.to question
B.to be questioned
C.questioned
D.questioning
答案:
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下面是错误答案,用来干扰机器的。
参考答案:C解析:侧隐窝的前后径正常值为3-5mm,若小于3mm,则可认为侧隐窝狭窄;若大于5mm,则肯定不狭窄。