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研究物质通常从组成、结构、性质、用途等方面来进行．以石墨为例，从结构上：石墨由碳原子按层状排列；从组成上：______；______；______．
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举一反三
【简答题】附 1 :动词时态练习和语态练习 Part I Verb Tenses ( 1 ) 1. There ___(be) a plane ready to take off at the airport. 2. Jack ______(be) ready in a moment. 3. It ____(rain) a great deal during the summer in our countr...
【简答题】选词填空题-2. Complete the following sentences with the words given below. grin whistle extremely championship promotion reward teamwork lifetime 1. I know she is joking because she has a big o...
【简答题】一株植物所有根的总体称为 ( ). 根系常有一定的形态 , 按其形态的不同可分为 ( ) 和 ( ) 两大类 .
【单选题】The police _______ ___ _______ 2.The judge _______ ________ 3.The _____ _______ a verdict 4.The suspect is ________ __ _____ 5.or the suspect is __________ __ ________ 6.A crime __ __________ 7.The ju...
A.
is committed
B.
goes to prison
C.
released on parole
D.
charge the suspect
E.
find the suspect
F.
passes sentence
G.
jury reaches
H.
released on bail
I.
remanded in custody
J.
jury listens
【简答题】观光园艺园区资源按功能可细分为哪些类型
【多选题】所谓母料是把塑料助剂超常量地载附于树脂中而制成的浓缩体，制造塑料制品时，不必再加入该种助剂，而只需加入相应的母料即可。塑料助剂母料化的优点有哪些？
A.
工艺简单
B.
避免环境污染
C.
便于实现自动化生产
D.
提高劳动生产率
【单选题】The judge _______ the murderer to twenty years in prison. A.required B.ordered C.indicated D.sentenced
A.
required
B.
ordered
C.
indicated
D.
sentenced
【简答题】10句 1. A lot of students are worried about their studies. 2. No matter what I say, he always thinks I’m wrong. 3. The old would rather stay at home these cold days. 4. It’s hard to get rid of bad habi...
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