化学用语是国际通用的化学语言，下列有关说法正确的是

【名词&注释】

二氧化硫、一氧化碳(carbon monoxide)、钠离子(sodium ion)、化学式(chemical formula)、氧分子(oxygen molecule)

[单选题]化学用语是国际通用的化学语言，下列有关说法正确的是

A. 20表示两个氧分子^{(oxygen molecule)}
B. 钠离子的符号为Na+
C. 一氧化碳的化学式是C0
D. H2O中含有氧分子^{(oxygen molecule)}

查看答案&解析查看所有试题

学习资料：

[单选题]CQuestionnaire

A. ReadthequestionsandanswerYESorNO,thenyouwillfindouthowgoodyouare.
B. 1.Whenyoudontunderstandsomething,youaskquestions.□
C. 2.Youlikelisteningtoolderpeopletalkaboutthepost.□
D. 3.Youthinkthatyouconlearnsomethinginterestingfromeveryonearoundyou.□
E. 4.Youorebraveenoughwhenyouhavetotalktopeopleyoudon'tknow.□
F. 5.Youenjoyreadingbooksaboutfamouspeople.□
G. 6.Youalwaysseeandtalktodifferentpeople.□
H. 7.Youareinterestedinlearningnewwaysofdoingthings.□
I. 8.Youenjoyshyingexperienceswithfriendsandlearningfrompeopleofallages.□
J. 9.Youtalkolotaboutyourself.□
K. 10.Evenifyouoreoftenwrong,youmakeyourowndecisions.□
L. 11.Youhateteachingwhatyouaregoodat:sports,technology,whatever.□
M. 12.Yourparentsdon'tunderstandyou,soyoudon'ttalktothemmuch.□
N. SCORENOW!
O. Score2pointsifyouanswerYEStoeachoftilefirst8questions,and0ifyouchooseNO.
P. Score2pointsifyouanswerNOtoeachofthelast4questions,and0ifyouchooseYES.
Q. 18--24.Youarefriendlyandopen-minded.Youmakepeoplefeelimportantbylisteningtowhattheyhavetosay.You'llprobablysucceedinlearningal1kindsofinterestingthings.Goodforyou!
R. 10--16Rememberthateverysinglepersonyouknowcanteachyousomething.Youwillgreatlymakeyourliferichandcolorful.
S. 0-8About400yearsago,afamouswriterwrote,"Nomanisanisland."Thisisstillmmtoday.Trytobemoreopenandinterestedinpeoplearoundyou.
T. 86.Ifyousay"YES"toallthesequestions,you'llget____points.
U. 12
V. 16
W. 20
X. 24

[单选题]为了经久耐用，在灯泡中可填充的气体是

A. 氧气
B. 氮气
C. 二氧化碳
D. 二氧化硫

[单选题]5． — I________ Is this your pencil sharpener?—Yes ，it is． Thanks．

A. Thanks
B. Sorry
C. Ask you
D. Excuse me

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