球囊的适宜刺激是( )A．水平面的直线匀速运动 B．水平面的直线变速运动 C．水平

A glue that holds the whole Internet together is the network layer protocol, (1) .Unlike most older network layer protocols, it was designed from the beginning with internetworking in mind. Its job is to provide a (2) way to transport data grams from source to destination, without regard to whether these machines are on the same network or whether there are other networks in between them.

Communication in the Internet works as follows. The (3) layer takes data streams and breaks them up into data grams. Each datagram is transmitted through the Internet, possibly being fragmented into smaller units as it goes. When all the pieces finally get to the destination machine, they are reassembled by the (4) layer into the original datagram. This datagram is then handed to the transport layer, which inserts it into the receiving process’ input stream.

An IP datagram consists of a header part and a text part. The header has a (5) part and a variable length optional part.

2（）

A．best-quality

B．quality-guaranteed

C．connection-oriented

D．best-efforts

小明、小红和小强一起在实验室做了如下几个实验：

小明把手放在喉头处，大声讲话，感觉喉头振动了；小红把发声的音叉放在水中激起水花；小强在吊着的大钟下固定一支细小的笔，敲响钟后，笔尖在纸下迅速拖过，纸上便画出一条来回弯曲的细线．

（1）他们共同探究的问题是：

答：______．

（2）分析上面的实验现象，能得出共同的结论是：

答：______．

（3）如果由你来设计一个类似验证问题的实验，你将怎样设计？写出你的设计．

答：______．

非经胃肠道给药的剂型有（）

A.注射给药剂型

B.呼吸道给药剂型

C.皮肤给药剂型

D.黏膜给药剂型

E. * * 给药剂型

下列哪项不是骨折切开复位术的优点（）

A.可使长骨干骨折达到解剖复位

B.有效的内固定，可使病人提前下床活动，减少肌萎缩和关节僵硬

C.可使关节内骨折，达到解剖复位

D.方便护理，减少并发症