下列式子可以表示m与n的差除以它们的和的是______，表示m与n的差除它们的和

下列程序段的输出结果是______。 int n=’c’； switch(n++) { default:printf("error");break； case’a’:printf("good");break； case’C’:printf("morning")； case’d’:printf("class")； }

铝热焊焊接用于断轨再焊时，插入的焊接钢轨长度应大于（）。

定向天线下顷角误差不大于（）

A、±5°

B、±3°

C、±1°

D、±0.5°

患者男.30岁。血压升高5年，住院检查疑为肾动脉狭窄。上述支持此诊断的为（）

A.满月脸，向心性肥胖，皮肤紫纹，多毛

B.发作时血压骤升，伴头痛、恶心、多汗、发作间期血压正常

C.血钾降低，肌无力或麻痹

D.尿中白细胞、脓细胞较多，且有尿急、尿频病史

E.上腹部可闻及血管杂音

Everybody dreams. Some people think dreams can tell us about the future. Other people think dreams can tell us about ourselves. It’s like our (11) is talking to us.
Why are dreams (12) strange and hard to understand Some people think our brain uses (13) to talk to us. When we fly, swim, or fall down in our dreams, it has a (14) meaning. Lots of doctors help people (15) their dreams. They find that dreams tell us about our (16) and fears.
These days, many scientists (17) that dreams are very important. During the day, we have many (18) , and our brain receives a lot of information. When we dream, our brain (19) information that is not important, and puts the most important information into our (20) . As we learn more about the brain, we may find answers to our questions about dreams.

Ⅰ. 完形填空

/Close
阅读下列短文，从每小题所给的A、B、C、D四个选项中选出一个最佳选项。

A．never

B．seldom

C．ever

D．often