www.wuhan.net.cn，其中一级域名是( )。
A．www
B．wuhan
C．net
D．cn
参考答案：D
读一读，补全对话。
A: Look, this is my school.
B: Great! Is this the library?
A: Yes, it is.
A: Is that ____________________________?
B: No, it isn't. It's the music room. The art room is on the first floor.
B: No, we don't have a TV room.
B: Yes, it is. We have lunch at school.
哪项治疗是最正确的
A．换血
B．光疗
C．输血浆
D．抗生素治疗
E．输新鲜血
