下列叙述正确的是 [ ] A．冷开水不能养鱼是因为水中不含氧元素 B．最外层电子

数字化彩超的关键技术是（）

A.宽频探头

B.二次谐波成像

C.数字或波束形成仪

D.多道电子开关选择发射及接收的振子

E.预置多种优化检查条件

（67） 不属于电子邮件协议。

A．POP3

B．SMTP

C．IMAP

D．MPLS

阅读理解诶。

     My first reaction was annoyance. It was Friday afternoon, and I was within an hour of finishing my

work for the week. As I was leaving, a nurse brought me one more patient message. The statement read:"Mm.

Jones called to say that she has had blurred vision (视觉模糊) ever since her medical test this morning." I

smiled. Suddenly our tests were causing eye problems. 

     This week my patients had questioned everything. My patient with high blood pressure had stopped coming

to her treatment on the advice of an Internet chat room. A woman who had a mental problem was substituting ( 用......代替) St. John's word for her medication. Now Mrs. Jones was imagining problems. I rolled my eyes. 

     My second reaction was worry. As I looked through her record, I tried to figure out why she would have

blurred vision, but nothing in her record explained the new problem. She' s probably just anxious, I thought.

Still, she wouldn't have called if she had been all right. I picked up the phone. 

     What I next felt can only be described as delight. Before I made the call, the nurse ran in: Mrs. Jones called.

Her vision is fine. Turns out she picked up the wrong glasses when she left the office. The X-ray technician

has been having the same problem. I let out a laugh. Mrs. Jones had been right. Her vision had been blurred.

Now we know why. 

     Finally I felt shame. I came to realize what Mrs. Jones had taught me. I had first known she was wrong,

that her anxiety had clouded her judgment. Instead, my medical training had clouded mine. Now I feel thankful

that Mrs. Jones figured it out before I made a mistake about our relationship. Patients come to me for my help.

They pay me to listen, diagnose (诊断), treat and talk. That suggests trust; I must remember that, and trust

them too.

1. The writer smiled while reading the patient message because he knew _____.

A. Mrs. Jones would ask for more tests

B. the patient was being unreasonable

C. the nurse was joking with him

D. Mrs. Jones would call him

2. What has caused Mrs. Jones' eye problem?

A. Wrong glasses.

B. Medical checkup.

C. Her own imagination.

D. Chatting on the Internet.

3. The underlined words "clouded her judgment" in the last paragraph probably mean _____. 

A. made her less trustful toward the doctor

B. put her in control of her own feelings

C. made her less able to think clearly

D. put her in a dangerous situation

早期鼻咽癌的影像学征象中正确的是（）。

A.咽旁间隙变窄

B.鼻咽壁增厚

C.鼻窦炎

D.三叉神经侵犯

E.颅底骨质破坏

目前严重制约着我国粮食物流发展和粮食安全的因素有哪些？