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问题 单项选择题

后牙邻面龋制备的窝洞是布莱克分类

A．第Ⅰ类洞

B．第Ⅱ类洞

C．第Ⅲ类洞

D．第Ⅳ类洞

E．第V类洞

答案

参考答案：B

解析：根据布莱克的分类，后牙邻面龋制备的窝洞命名为第Ⅱ类洞。

句型转换

这些句式你掌握了吗？按要求改写下列句子。

1. My father has been a worker for 15 years.( 就画线部分提问)

    _____ _____has your father been a teacher?

2. We bought some mushrooms in that shop.( 改为否定句)

    We_____ _____ _____ mushrooms in that shop.

3. He has lived in Beijing for two years.( 改为否定句)

    He_____ _____ in Beijing for two years.

4. I wanted to drink milk because I was very thirsty.( 就画线部分提问)

    _____ _____you want to drink milk?

5. He has to go home now.( 改为一般疑问句)

    _____ he_____to go home now?

6. He needs three bananas when he makes a fruit salad.( 就画线部分提问)

    _____ _____ _____does he _____when he makes a fruit salad?
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单项选择题

使慢性粒细胞白血病达到血液学缓解的首选药物是______

A．白消安
B．羟基脲
C．靛玉红
D．a干扰素
E．环磷酰胺
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