不宜用腹部仰卧前后位摄影的是（） A.观察泌尿系结石 B.观察腹部钙化 C.观察造影

在石油、化工生产过程中，设备检修时，设备内作业应办理设备内安全作业证，严格履行审批手续。下列有关设备内作业的描述正确的是＿。

A.进人地坑作业不属设备内作业

B.在设备内作业至少每隔3小时分析一次设备内的毒气浓度

C.在潮湿容器、狭小容器内作业时，设备内照明电压为36V

D.检修作业因意外情况撤出人员，需要再次进人现场时，必须重新审批

Good morning. The program today is about music. The word “music” comes from the Greek word “muse”. The Muses are the goddesses of the arts. The Music is only one of the arts. It is like the spoken language, but it uses sounds. Today’s program brings together music from different concerts of the world. Who invented music? Who sang the first song? No one knows exactly the answers to these questions. But we know that music plays an important part in almost everyone’s life. Babies and young children love to hear people singing to them. When they are a little older, they like to sing the songs they have heard. When children go to school, their world of music grows. In the middle grades, students take music lessons. When they reach high school, they become interested in listening to pop music. 

The records we have chosen for you today are from American country music, Indian music, pop music and so on. Music has meaning for everyone. It can make people happy or it can make them sad. In this program we shall study the language of music. We shall be trying to find out more about how music works. We shall try to find out how music says what people feel.

Now, here comes the music today , I shall explain why they are all good music.

小题1:The first paragraph is mainly about the             .

A．styles of music

B．history of music

C．taste of music

D．knowledge of music小题2:Which is NOT the purpose of this music program?

A．To study the language of music .

B．To learn more about the music.

C．To give a complete background to the music.

D．To give people some music to listen to.小题3:The speaker is probably        . 

A．a host

B．a singer

C．a dancer

D．a teacher

08-475道岔捣固车联合起拨道装置由哪几部分组成？

能很准确地检查出工件内部或表面所存在的缺陷大小、位置和性质的检验方法是（）。

A．超声检测

B．射线检测

C．涡流检测

D．磁粉检测

华生在以小艾尔伯特为被试的恐惧实验中，采用的研究方法是（）。

A．刺激—反应法

B．单词诱导法

C．图片诱导法

D．音乐诱导法