题目内容

用下列句子前括号里单词的适当形式填空并翻译句子。1.(fair)"It's ____!" John complained.2.(end)I’mfedupwithyour____complaining.3.(close)Theliftingofthecurtain____abeautifulwinterscene.4.(appoint)Myparentswere_____withmebecauseIfailedtheexam.5.(spell)Thebookcontainsquiteafew_____words;theproof-readerreallyshouldhavebeenmorecareful.6.(understand)Don’t____hissi-lenceforlackofinterest;actuallyheisveryinterestedinthesubjectwearediscussingnow.7.(load)TheAmericanshiparrivedattheportyesterday,andworkersare_____itscontentsintheharbornow.8.(certain)Ihadalongtalkwithhimyesterday,butI’mstill_____abouthisintention.9.(regular)Thatyoungmotherdoesnotlike_____workinghours.10.(proper)Jokingwithotherpersonsatthisofficialcelebrationis_____behaviorforsuchaseriousoccasion.

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若外加磁场强度H0逐渐增大时,则使质子从低能级E1跃迁到高能级E2所需的能量( )。

A. 不发生变化
B. 逐渐变大
C. 逐渐变小
D. 不变或逐渐变小

核磁共振氢谱不能给出的信息是( )。

A. 质子类型
B. 氢分布
C. 氢核间的关系
D. 碳的骨架信息

塑性变形可以恢复吗:

A.可以
B.不可以

发泡聚苯乙烯可以压缩吗:

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