制备硬胶囊壳需要加入的附加剂不包括（） A.乳化剂 B.增塑剂 C.遮光剂 D.增稠

关于骨盆摄影，下列说法错误的是（）

A.常规应使用滤线器

B.侧位为非常规位置

C.摄影前可清洁灌肠

D.前后位为常规位置

E.胎儿检查最为常用

某人一个生殖细胞中的染色体组成是22条常染色体+X性染色体，这个细胞可能是（　　）

A．卵细胞

B．精子细胞

C．卵细胞或精子细胞

D．受精卵

下列有关利福平的描述正确的是

A．对耐药金黄色葡萄球菌感染有效
B．不能治疗麻风病
C．对结核分枝杆菌不易产生耐药性
D．常见副作用为肝毒性
E．无致畸作用

阅读理解

     When writer Nicholas Carr began researching his book on whether the Internet is bad for our minds.

he restricted (限制) his online access.

     His new book "The Shallows:What the Internet is Doing to Our Brains"  suggests the latest technology makes us less able to think deeply.Cart found he couldn't concentrate and that he couldn't work on the

book while staying online.

     "So. I was only checking my email a couple of times a day rather than every 45 seconds.I found those

types of things really did make a difference. " he said.

     After at first feeling uncomfortable with his sudden loss of online connection. within a couple of weeks. Carr was able to stay concentrated on one task for a longer period.

     Carr wrote a 2008 Atlantic magazine piece that asked a question  "Is Google Making Us Stupid?"  

and wanted to dig deeper into how the Internet changes our minds.His book examines the history of

reading and the science of how using different media (媒体) changes our brains.Exploring how society

changed from an oral tradition to the printed word and to the Internet. he explains how the brain adjusts

itself to new information sources.

     Reading on the Internet has greatly changed how we use our brains. he writes.Facing a lot of text.

photos. videos. music. text messages. emails and blogs. our minds have become used to skimming (略

读) and scanning (跳读) information.As a result. we have developed sharper skills at making fast

decisions. Carr says.But now most of us infrequently read books. long essays or articles that would help

us concentrate. Carr writes.

     Carr says for centuries books helped focus our minds on one topic at a time.He has a suggestion for

those who feel web surfing has left them unable to concentrate-slow down. turn off the Internet and

practice the skills of being deep in thought.

1. Nicholas Carr's new book is mainly to study________.

A. the advantages of the Internet

B. the development of our brains

C. the ways of using the Internet

D. the bad influences of the Internet

2. What may we find in Nicholas Carr's new book?

A. The history of the Internet.

B. The media's influence on our brains.

C. Ways of reading online.

D. Ways of training our brains.

3. According to Nicholas Carr. we make fast decisions because of________.

A. our reading habits

B. our smarter brains

C. there being fewer books

D. there being less information

4. According to Nicholas Carr. ________.

A. people should spend more hours on Internet surfing

B. people can do a better job when they do web surfing

C. reading books helps people concentrate on one topic

D. Internet and latest technology make people think more deeply

5. What is the purpose of the last paragraph?

A. To change our habits of life.

B. To give us some warnings.

C. To ask us to buy Carr's new book.

D. To give us some useful advice.

混凝土在持续不变的压力长期作用下，随时间延续而继续增长的变形称为（）。

A.应力松弛

B.收缩徐变

C.干缩

D.徐变