海上承运人对装船的集装箱负有安全运输、保管、照料之责任，并依据集装箱提单条款划分与货

In low-speed network, it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down. In high-speed networks, this approach often works poorly, because in the (64) between sending the notification and notification arriving at the source, thousands of additional (65) may arrive. In ATM network , a major tool for pre- venting (66) is (67) control. When a host wants a new virtual (68) , it must describe the traffic to be offered and the service expected.

64（）

A．interval

B．time

C．slot

D．delay

已知a+b=7，ab=12.则a²+b²=（     ）。

患者，是肺虚久咳病人，兼有倦怠乏力之证，医生用六君子汤治疗后好转，此法符合中医哪种治则？（）

A.急则治其标，缓则治其本

B.益火消阴

C.开通表里

D.通因通用

E.虚补其母

早期强度较高的水泥品种有（）

A.硅酸盐水泥

B.普通水泥

C.矿渣水

D.火山灰水泥

E.复合水泥

《预归类决定书》自海关（）有效。

A.签发之日起半年内

B.签发之日起一年内

C.签发之日起两年内

D.签发之日起