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问题 单项选择题

牙本质区中的脱矿层

A．牙本质小管结构不明显

B．成牙本质细胞发生脂肪变性

C．扩张的小管可排列成串珠状

D．牙本质小管结构较完整

E．是牙本质龋损的最表层

答案

参考答案：D

填空题

根据人教版九年级英语Unit12 I used to be afraid of the dark，用所给单词的适当形式填空。

1. It's even ____     (good) than I thought it would be.

2. And you wouldn't believe how              (quick) my French has improved.

3. I'm very comfortable              (speak)  French  now.

4. My biggest challenge is learning how               (behave) at the dinner table.

5. Another thing is that it is very rude                (say) you're full.

6.I find it difficult                (remember) everything.
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单项选择题

支气管肺炎的叙述，哪一项错误？（）

A.好发于婴幼儿，老年及长期卧床的患者

B.病理表现为小支气管及肺小叶炎症

C.病灶多位于两肺下野中内带

D.X线表现两肺纹理多，粗而模糊，伴有斑片状模糊影

E.常出现肺空洞
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