下列哪项不是郁金的功能（） A.祛风止痛 B.行气破瘀 C.清心解郁 D

有关胎产式的概念，下列说法不正确的是（）

A.胎体纵轴与母体纵轴的关系称为胎产式

B.两纵轴垂直者称横产式

C.两纵轴交叉呈角度者称斜产式

D.斜产式多转为横产式

E.两纵轴平行这称纵产式

盾构法施工一般对注浆材料的性能有( )要求。

A．注入时不离析

B．注入后体积收缩小

C．具有均匀的低于地层土压的早期强度

D．适当的黏性，以防止从盾尾密封漏浆或向开挖面回流

E．流动性差

关于下列四幅图的说法，正确的是       ；

A．甲图中估测油酸分子直径时，可把油酸分子简化为球形处理

B．乙图中，显微镜下看到的三颗微粒运动位置连线是它们做布朗运动的轨迹

C．烧热的针尖，接触涂上薄蜂蜡层的云母片背面上某点，经一段时间后形成图丙的形状，则说明云母为非晶体

D．丁图中分子间距离为r₀时，分子间作用力F最小，分子势能也最小

有关子宫动脉的描述．不恰当的是（）

A.子宫动脉的下支可营养子宫颈和 * * 上部

B.约距宫颈内口处水平与输尿管交叉

C.在宫颈 * * 部分为上、下两支

D.子宫动脉的上支可营养子宫体、卵巢和输卵管

E.是髂内动脉前千的分支

A transport layer protocol usually has several responsibilities. One is to create a process-to-processcommunication UDP uses（1）numbers to accomplish this. Another responsibility is to provide controlmechanisms at the transport level, UDP does this task at a very minimal level. There is no flow control mechanismand there is no（2）for received packet. UDP, however, does provide error control to some extent. If UDPdetects an error in the received packet, it will silently drop it.

The transport layer also provides a connection mechanism for the processes. The （3）must be able to sendstreams of data to the transport layer. It is the responsibility of the transport layer at （4） station to make theconnection with the receiver chop the stream into transportable units, number them, and send them one by one. Itis the responsibility of the transport layer at the receiving end to wait until all the different units belonging to thesame process have arrived, check and pass those that are （5）free, and deliver them to the receiving process asa stream.

（5）是（）

A.call

B.state

C.cost

D.error