有一个正方形的周长和一个长方形的周长相等。已知正方形的边长是61厘米,长方形的长为82厘米。这个长方形的宽是多少厘米()
A.40
B.50
C.60
D.30
参考答案:A
巨噬细胞摄取抗原的方式是()
A.非特异性吞噬颗粒性抗原
B.非特异性吞噬可溶性抗原
C.被动吸附抗原
D.借助表面IgGFc受体结合抗原抗体复合物
E.以上均是
补全对话,每空一词。
A: Good morning.
B: Good morning. What are you 1 now?
A: I'm 2
B: Running? What's 3 with your bike?
A: It's 4 . Could you mend it?
B: Yes, I can. But now let's 5 games.
A: OK. What 6 a frisbee (飞盘) ?
B: Good. Can you 7 it?
A: Yes, I can. Throw it 8 this.
B: No, you are 9 . Do it like this.
A: I know. It's very 10 .
1. 2. 3. 4. 5.
6. 7. 8. 9. 10.