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问题
单项选择题
关于乳牙髓腔特点,下列说法错误的是()。
A.牙髓室大
B.髓室壁薄
C.髓角高
D.根管细
E.根尖孔大
答案
参考答案:
D
选择题
It was _____ back home from work.
A. not until midnight did he go
B. until midnight that he didn't go
C. not until midnight that he went
D. until midnight when he didn't go
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填空题
一般说来,肯定句语气比较()、(),否定句语气比较()、()。
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