下列系统中，( )是实时系统。A．计算机激光照排系统 B．航空订票系统 C．办公

能凉血化瘀止血，治血热夹瘀的出血证宜首选（）。

A.茜草

B.大蓟

C.蒲黄

D.白及

E.艾叶

非麦角生物碱类DA受体激动药是（）

A.卡麦角林

B.罗匹尼罗

C.托卡朋

D.溴隐亭

E.普拉克索

有效循环血量指的是()

A．维持正常代谢的血容量

B．全身总血容量

C．单位时间内通过心血管系统的循环血量

D．包括储存于肝，脾和骨髓的总血量

E．包括停滞于毛细血管内的总血容量

任务型阅读。

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

     "OK, class. Count off (报数)by five."   1   Sometimes, breaking into small groups lasts as long as the class

does. Other times, it signals the start of a"group project"-which means you'll be working with a few classmates

for a day, several days, or longer on an assignment (任务). 

       2   Most things are done with the help or ideas of other people. Group projects are great practice for high

school, college, and real life, when you will probably have a job that requires working with others. Right now,

group projects can be fun and they often allow you to do a bigger, more interesting project than you could

alone.   3        

     Group projects also give you a chance to get to know kids you might not know or talk with-maybe the

quiet kid in the third row, or the boy who lived down the street when you were in kindergarten.   4   For

example: working on a deadline (最后期限),staying organized, or being patient. And if you're a little nervous

talking in front of a group, a joint (联合的) project can help you become more comfortable with it. 

       5    If so, you'll know your whole group is rooting for you!

A. Few of us act alone in the real world.

B. Why is this type of project so popular in school?

C. With group work, you can actually learn more in less time.

D. Maybe your group will pick you to tell the whole class about your project.

E. Group projects are also a great way to practice skills you're not so sure of.

F. When your teacher gives you that instruction, you know what's coming next.

G. One key to a good meeting is having a leader, who should help the group stay focused.

“要我增加功率吗”的业余无线电通信Q简语为（）

A.QRO？

B.QSO？

C.QRO？

D.QRS？