以下对右丁步的概述错误的是（）。 A.并步站立，两腿屈膝半蹲，右脚全脚着地 B.右脚

计算机网络可以实现各计算机之间的数据传送。可以根据需要对这些数据进行集中与分散管理。（）

阅读理解。

     In so many ways, cyberspace (网络空间) mirrors (反映) the real world. People ask for information,

play games, and share hobby tips. Others buy and sell products. Still others look for friendship, or even

love.

     Unlike the real world, however, your knowledge about a person is limited to words on a computer

screen. Identity (身份) and appearance mean very little in cyberspace. Rather, a person's thoughts or at

least the thoughts they type are what really counts. So even the shyest person can become a chat-room

star.

     Usually, this "faceless" communication doesn't create problems. Identity doesn't really matter when

you are in a chat-room discussing politics or hobbies. In fact, this emphasis (重视) on the idea themselves makes the Internet a great place for exciting conversation. Where else can so many people come together

to chat?

     Some Internet users want more than just someone to chat with. They are looking for serious love

relationships. Is cyberspace a good place to find love? That answer depends on whom you ask. Some of

these relationships actually succeed. Others end in tears. Supporters of online relationships claim that the

Internet allows couples to know how intelligent they are first. Personal appearance doesn't get in the way.

      But critics (批评者) of online relationships argue that no one can truly know another person in

cyberspace. Why? Because the Internet gives users a lot of control over how others view them. Internet

users can carefully choose their words to fit whatever image they want to give. And they don't have to

worry about what their non-verbal communication is doing for their image. In a sense, they're not really

themselves. All of this may be fine if the relationship stays in cyberspace. But not knowing a person is a

big problem in a love relationship. With so many unknowns, it's easy to let one's imagination "fall in the

blanks". This surely leads to disappointment when couples meet in person. How someone imagines an

online friend is often quite different from the real person.

     So before looking for love in cyberspace, remember the advice of Internet pioneer Clifford Stoll,

"Life in the real world is far richer than anything you'll find on a computer screen."

1. Which would the critics of online relationships most probably DISAGREE to?

A. Nobody can truly know another person in cyberspace.

B. Internet users can choose words to create any image they like.

C. The Internet allows couples to know how intelligent they are.

D. In a sense, Internet users are not really themselves.

2. Even the shyest person can become a chat-room star because what's really important is

    a person's ________.

A. non-verbal communication            

B. thoughts typed on the screen

C. knowledge and appearance            

D. identity shown in the chat

3. The underlined word "This" (Paragraph 5) refers to_______.

A. imagining online friends with so many unknowns.

B. forming personal relationship in cyberspace.

C. having exciting conversations online.

D. knowing a person in a love relationship.

4. What's the writer's attitude towards finding love in cyberspace?

A. Positive

B. Disinterested

C. Interested

D. Negative

男性，59岁，肺心病16年，本次咳嗽，咳痰2周，在家自己服用抗生素，未见明显效果，并出现呼吸困难，1天前出现烦躁不安，继之神志恍惚。查体：唇绀，颈静脉充盈，两肺底闻及细湿啰音，体温38．3℃，脉搏110次／分，血压100／60mmHg，双下肢水肿，尿蛋白（+），大便潜血（+）

如予以血气分析诊断明确后，予以抗生素、利尿剂等积极治疗，病人病情好转，水肿减轻，但患者出现躁动、手足抽搐现象，则最可能并发了（）

A.呼吸性酸中毒

B.呼吸性碱中毒

C.代谢性酸中毒

D.代谢性碱中毒

E.神经症状

生态工业是一种循环经济发展模式，下列对其发展模式的作用表述不正确的是（）。

A．充分利用资源优势和产业优势

B．减少废物产生、物质循环利用

C．提高了经济发展规模和质量

D．以高物牦、高污染、低效率为其特征

DR摄影和CR摄影相比，在哪方面不如CR（）

A.图像质量

B.曝光剂量

C.系统兼容性

D.工作效率

E.信噪比