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【简答题】
现有下列物质：甲烷、氢气、二氧化硫、石灰水、白磷、酒精、水、空气（均写物质名称）． （1）属于单质的是______； （2）属于有机物的是______； （3）属于氧化物的是______； （4）属于混合物的是______．
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皮皮学刷刷变学霸
举一反三
【简答题】按要求写出下列单词的正确形式。 1. find (过去式) _____________ 3. heavy (反义词) _____________ 5. healthy (名词) _____________ 2. remember (对应词) _____________ 4. strong (反义词) _____________ 6. sing (名词) _____________
【简答题】In a great many cities, hundreds of people ride bicycles to work everyday. In New City, some bike riders have even formed a group called Bike for a Better City. They declare that if more people rode b...
【简答题】按要求写单词。 1. strong (反义词) _______________ 3. weak (反义词) _______________ 5. flower (复数) _______________ 2. healthy (反义词) _______________ 4. first (反义词) _______________ 6. eat (过去式) _______________
【单选题】Analogue of sulfonamides is
A.
Four hydrogen folic acid
B.
dihydrofolate
C.
Para-Aminobenzoic Acid (PABA)
D.
Folic acid
E.
pyrimidine
【简答题】ogue network
【单选题】Bicycle riders want the city government to set asidespecial lane for bicycles on some of the main streets, but though they have got some supporters, ______ likes the idea.
A.
everyone
B.
not everyone
C.
no one
D.
none
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