离心泵的流量调节可以通过改变（）和（）改变的方法来调节。

任务型阅读。

     Movable Type(活字印刷)：By using Movable Type, books could be printed cheaply and easily,

Bi Sheng invented Movable Type in China in the 11th century.

     Telephone: Alexander Graham Bell made the first telephone call in 1876. “Mr. Watson, come here.

I want you,” he said to his assistant over the phone line. And with those famous words, the world was

about to get much smaller.

     Airplane: The Wright brothers made the first powered flight in 1903. Air travel has made the faraway places suddenly become closer.

     Internet: When the Internet was created in 1969, only a few people knew about it. But more than

650 million people in the world use it now. The Internet has made information about anything easy to get.

阅读短文，根据短文内容补全所给的五个残缺的句子。每空只能填一词。

1.Books could be printed cheaply and ________ by using Movable Type.

2.The first telephone call was made in ________.

3.Air travel has made the faraway places become ________.

4.The Internet is now used by ________ 650 million people in the world.

5. The above passage talks about the ________ which change the world greatly.

在公园照相馆里，摄像人员可以利用照相机和穿衣镜，只按 动一次快门在同一张底片上呈现某同学的两个像，如图所示，点S代表某同学，请在图中作出照相的光路。

患者男，37岁，因“颈部肿块”入院。无不适症状，查体无特殊。胸部X线片：双侧淋巴结肿大。诊断为结节病。

针对该病激素治疗的适应证不包括（）

A.Ⅰ期结节病

B.Ⅱ期结节病

C.Ⅲ期结节病，广泛纤维化

D.眼部结节病

E.高钙血症

用游标卡尺的      （填“A”或“B” ）测脚测定某圆筒的内径，示数如图b，由图读出圆筒的内径为     cm。

男，29岁。排便时肛门剧痛1周。有鲜血滴入便池，排便后肛门疼痛加重。造成便后肛门疼痛加重的机制是（）

A.继发肛窦炎

B.肛门括约肌痉挛

C.肛管皮肤全层裂开并形成慢性溃疡

D.粪便干燥，排便用力过度

E.截石位的12点处神经敏感