学习用杯喝奶的时间| A.0～4个月龄 B.4～6个月龄 C.7～9个月龄 D.幼儿

“己所不欲，勿施于人”就是要求我们在人际交往中要   [ ]

①对人持平等、尊重和友善的态度    

②关心他人、尊重他人、理解他人    

③换位思考、与人为善    

④被人冒犯、误解时要无原则的谅解对方  

A．①②③④    

B．①②③    

C．①③④    

D．①②④

“重农抑商”的观念与政策对中国传统社会产生了重要影响。下列理解错误的是

A．重农抑商政策是维护社会稳定的举措

B．重农抑商观念在明清时期已基本瓦解

C．重农抑商观念是中国农耕社会的产物

D．重农抑商政策提升了战国时秦国国力

装配好的磁极应根据磁极线圈接头位置的不同编上相应的序号，同时将质量接近的磁极装在( )的位置上。

A．相邻

B．相同

C．对称

D．相反

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. Anotherresponsibility of a transport layer protocol is to create a（2）and error-control mechanism atthe transport level. TCP uses a sliding（3）protocol to achieve flow control. It uses theacknowledgment packet, time-out, and retransmission to achieve （4） control. The transportlayer is also responsible for providing a connection mechanism for the application program. Theapplication program sends （5）of data to the transport layer. It is the responsibility of thetransport layer at the sending station to make a connection with the receiver.

（5）是（）

A.ports

B.streams

C.packets

D.cells

掘进工作面透水有哪些预兆？