小肠吸收细胞是（）
A.游离面有刷状缘的扁平细胞
B.游离面有刷状缘的柱状细胞
C.游离面有刷状缘的潘氏细胞
D.游离面有刷状缘的粘液细胞
参考答案：B
补全对话。
A: Hi, Li Lei! 1 What have you beer doing these days?
B: I have been a member of the school volunteer project. 2
A. Of course. But I don't know what I can do?
B: 3
A: Playing the guitar.
B: 4
A: 5 Thank you.
B: You are welcome.
A. Would you like to join us?
B. I haven't seen you for a long time.
C. Good idea.
D. What's your hobby?
E. Well, you could help coach a guitar team for little kids.
