超声波在介质中的传播速度就是（）的传播速度

用吸管能将玻璃瓶中的饮料吸入口中，这是因为（　　）

A．大气压将饮料压入口中

B．嘴对饮料有吸力

C．手将饮料压入嘴里

D．以上说法都不正确

男性，32岁，近5年来上腹部疼痛，尤以饱食后明显。今日右上腹剧痛5小时就诊。检查：一般情况尚好，板状腹，全腹压痛及反跳痛。

手术后早期的并发症为

A．吻合口出血

B．低血糖综合征

C．倾倒综合征

D．贫血

E．术后腹泻

填空

     Classroom is like a second home for kids. So ____1____  is important for teachers to decorate the

classroom carefully to make students feel comfortable.

     Walls are the first thing one realizes  ____2____  coming into the room. You can ask your students to draw  ____3____  they feel like on pieces of papers and then stick these papers on the walls.  ____4___way, the kids will love the classroom they've decorated themselves!

     The lighting arrangement of the classroom will obviously depend ____5____ where the classroom lies. If the classroom is too bright, put thick curtains and have warmcolored lamps. If the classroom is in a

place ____6____  light can't come in easily, have light pink curtains and a few blue, yellow lamps.

     Also you should decorate the bulletin board carefully. You can use different topics to decorate it, like

filling the board  ____7____   pictures of colorful flowers and birds in spring. You can also decorate it

 ____8____  to the subject you teach.

鸟害多发区线路应及时安装防鸟装置，如防鸟刺、防鸟挡板、悬垂串第一片绝缘子采用（）、复合绝缘子横担侧采用防鸟型均压环等。

A.防污型绝缘子；

B.小盘径绝缘子；

C.大盘径绝缘子；

D.玻璃绝缘子。

隐睾最常见的部位是

A．腹膜后

B．腹股沟管

C．阴囊上部

D．腹腔

E．盆腔