皮皮学，免费搜题
登录
搜题
【单选题】
下列选项中,哪个是TCP协议的“三次握手”中的第一次握手()A.
客户端再次向服务器端发送确认信息，确认连接
B.
服务器端向客户端回送一个响应，通知客户端收到了连接请求
C.
客户端向服务器端发出连接请求，等待服务器确认
D.
以上选项都不对
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Task 3 Most animals only have animals of a different kind for food. But sometimes two kinds of animals come together in a partnership ( 伙伴关系 ) which is good forthem. You may have noticed some birds on...
A.
they can eat its parasites
B.
they enjoy traveling with the sheep
C.
they can’t live without its parasites
D.
they want to find the warm place
【简答题】听音，选择听到的句子。 ( ) 1. A. What is it? ( ) 2. A. Can a cow fly? ( ) 3. A. This is a rabbit. ( ) 4. A. What can they do? ( ) 5. A. A bird can fly. B. What is this? B. Can a sheep fly. B....
【单选题】Task 2 Most animals only have animals of a different kind for food. But sometimes two kinds of animals come together in a partnership ( 伙伴关系 ) which is good forthem. You may have noticed some birds on...
A.
they can eat its parasites
B.
they enjoy traveling with the sheep
C.
they can’t live without its parasites
D.
they want to find the warm place
【单选题】Task 16 Most animals only have animals of a different kind for food. But sometimes two kinds of animals come together in a partnership ( 伙伴关系 ) which is good forthem. You may have noticed some birds o...
A.
they can eat its parasites
B.
they enjoy traveling with the sheep
C.
they can’t live without its parasites
D.
they want to find the warm place
【简答题】Read and choose. 找朋友。 ( )1. What's this? ( )2. Is this a sheep? ( )3. What colour is it? ( )4. Is this a cat? ( )5. Happy birthday! A. It's red. B. Yes, it is. C. It's a sheep. D. ...
【简答题】大资产阶级是中国民主革命的主要对象之一，因此，它始终是被排除在统一战线之外的。
【单选题】—Is this a goat? —No. It's a ______ . They're _____.
A.
goat; the same
B.
goat; different
C.
sheep; different
相关题目：
参考解析：
知识点：
题目纠错 0
发布
