实热证的面色是A．满面通红 B．两颧潮红 C．面色青灰 D．面红如妆 E．面黄带晦

选择适当的句子补全对话。

A. So I'm often late  for school.    

B. Usually by bus

C. I leave home at about 7: 40.      

D. Why not 

E. What time do you usually get up?  

F. Don't worry

Teacher: How do you usually come to school?

Student: 1._________

Teacher:2._________

Student: I usually get up at 6:40.

Teacher: Well.  What time do you usually leave home?

Student: 3._________Teacher: Why not come a little earlier?

Student: Sorry,  I can't.

Teacher: 4._________Student:  My mother is ill in bed.  So I have to look after her and give

              her medicine at the right time.5. _________

Teacher: I know.  You're a good boy!

如图所示的电路，电源的电动势E=20 V，内电阻r=2 Ω，定值电阻R₁=18 Ω，滑动变阻器的阻值可在0～50 Ω之间调节，闭合开关S，调节R₂的阻值，变阻器R₂消耗的最大功率为

A．5W

B．5.6W

C．18W

D．20W

下列传染病按甲类传染病报告管理的是（）

A.流脑

B.人禽流感

C.菌痢

D.伤寒

E.AIDS

简述储存的形式。

说“生命的本质在于信息”，是因为（）。

A.生命是由信息创造的

B.信息给生命带来物质和能量

C.生物通过生命信息系统维系和延续物种

D.非生命物体运动过程中，信息只起辅助作用