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问题 多项选择题

钢筋的常用连接方法有（）。

A.焊接连接

B.铆钉连接

C.化学粘接

D.机械连接

E.绑扎连接

答案

参考答案：A, D, E

解析：

此题相当简单，属业界常识，主要考核常用钢筋连接方法的知识点。

钢筋的连接方法有焊接、机械连接和绑扎连接三种。

选项B、选项C明显是钢结构的连接方法。

故本题正确选项应为“ADE”。

单项选择题

教育者重视在儿童发展的某一关键期对儿童施以相应的教育，这是因为人的发展具有( )

A．顺序性和阶段性

B．稳定性和可变性

C．个别差异性

D．不平衡性
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单项选择题 共用题干题

A transport layer protocol has several responsibilities, One is to create a process-to-process (program-to-program) communication; TCP uses port (1) to accomplish this. Another responsibility of a transport layer protocol is to create a  (2) and error-control mechanism at the transport level. TCP uses a sliding (3) protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve  (4) control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends  (5) of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.

空白（3）处应选择（）

A.path

B.window

C.frame

D.diagram
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