杜克嗜血杆菌主要引起何种疾病（）
A.肺炎
B.软性下疳
C.肾炎
D.腹泻
E.关节炎
参考答案：B
Think and write. 请根据中文提示，完成下列句子。
1. What (时间) is it?
2. I have (十支) pens.
3. I like (数学).
4. It's 7 (点钟).
5. (英语) is easy.
6. It's time (为；给) school.
7. Li Ming has (三个) bags.
8. (晚安), Mum.
9. I (想要) to sleep.
10. It's time to get up (现在).
弯曲件的内层最小弯曲半径一般应不小于板的（）。
