RIP规定一条通路上最多可包含的路由器的数量是( )。
A.1个 B.15个C.16个 D.没有限制,无数个
参考答案:B
补全对话。
A: Look! This is my new bike.
B: 1.____.
A: How do you go to school?
B: 2.____.
A: Is your home far from your school?
B: Yes, 3.____.
A: What do you like to do in the park?
B: I like music. 4.____.
A: 5.____.
B: It's sunny today. Let's go there together.
A: OK!
受体阻滞药的特点是
A.对受体有亲和力,有内在活性
B.对受体无亲和力,有内在活性
C.对受体亲和力高,内在活性低
D.对受体无亲和力,无内在活性
E.对受体无亲和力,无外在活性