右图中X为电源,Y为浸透饱和食盐水和酚酞试液的滤纸,滤纸中央滴有一滴KMnO4溶

题型:选择题

问题:

右图中X为电源,Y为浸透饱和食盐水和酚酞试液的滤纸,滤纸中央滴有一滴KMnO4溶液,通电后Y中央的紫红色色斑向d端扩散.下列判断正确的是(  )

A.滤纸上c点附近会变红色

B.Cu电极质量减小,Pt电极质量增大

C.烧杯中溶液的pH增大

D.烧杯中SO42-向Cu电极定向移动

考点:原电池原理电解池原理
题型:选择题

(1)2004年春,轰动全国的安徽阜阳市劣质奶粉事件,导致出现200名“大头婴儿”和10多名婴儿夭亡.经检测,劣质奶粉几乎不含______等促进婴儿生长发育的营养素.

(2)医生给病人输液时,常用葡萄糖注射液.右图为葡萄糖注射液的部分标签图,我能根据右图回答下列问题:

①葡萄糖的化学式为C6H12O6,它是由______种元素组成,其相对分子质量是______.

②每克葡萄糖完全氧化约放出17.2 kJ的能量,一瓶这样的葡萄糖注射液可放出______kJ的能量.

③现要配制10 kg这种葡萄糖注射液,需用葡萄糖______㎏.

题型:选择题

李师傅要做600个零件,前8小时做了480个.要完成全部任务,一共需要多少小时?

题型:选择题

下列各项,除哪项外,均可见于肝气郁结()

A.胁肋胀痛

B.眩晕耳鸣

C.胸闷喜太息

D.易怒

E.月经不调

题型:选择题

阅读理解

     Have you ever heard the old saying, "Never judge a book by its cover."? This is a good rule to

follow when trying to judge the intelligence of others. Some people have minds that shine only in

certain situations. A young man with an unusual gift in writing may find himself speechless before a

pretty girl when he speaks. He may not be able to find the right words. But don't make the mistake

of thinking him stupid. With a pen and paper, he can express himself better than anybody else.

    Other people may fool you into overestimating(过高估计) their intelligence by putting up a good

front. A student who listens attentively and takes notes in class is bound to (一定会) make a favorable

impression on his teachers. But when it comes to exams, he may score near the bottom of the class.

    In a word, you can't judge someone by appearance. The only way to determine a person's intelligence

is to get to know him. Then you can see how he reacts to different situations. The more situations you

see, the better your judgment is likely to be. So take your time. Don't judge a book by its cover.

1. The passage suggests that ______.   

A. a good writer may not be a good speaker    

B. a good writer is always a good speaker 

C. a speechless person always writes well    

D. a good writer will find himself speechless

3. According to this passage, a student who listens attentively and takes notes in class ________.            

A. is an intelligent student 

B. may not be an intelligent student 

C. will score better in exams 

D. will not be a good student

3. The passage suggests that we should judge a person's intelligence through ______. 

A. his teachers                      

B. his deeds in the classroom 

C. his appearance                    

D. his reactions to different situations

4.  The writer of this passage wants to tell us not to______.    

A. judge a book by its cover 

B. make the mistake of thinking a young man stupid 

C. overestimate a student's intelligence 

D. judge a person's intelligence by his appearance

题型:选择题

54岁的男性,上班时他人发现其口角歪斜,诊断为左侧面神经麻痹。

本病例治疗时应先用()

A.大量抗生素

B.皮质激素

C.针灸

D.维脑路通

E.卡马西平

更多题库