MAC地址长()位,IEEE定义了前面一部分表示制造商,后面一部分表示接口数或其他有用信息。
参考答案:48
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.
与Graves病发病无关的因素是()
A.体液免疫
B.遗传因素
C.细胞免疫
D.高功能性甲状腺腺瘤
E.慢性淋巴细胞性甲状腺炎