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【单选题】
圆锥花序与下列哪种花絮的排布方式相似?
A.
穗状花序
B.
葇荑花序
C.
总状花序
D.
伞形花序
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参考答案:
举一反三
【单选题】唾液中的消化酶主要是
A.
淀粉酶
B.
溶菌酶
C.
麦芽糖酶
D.
肽酶
E.
凝乳酶
【简答题】二、把下面的单词按照正确的顺序排列成一句话。 1、customers, most, of, from, are, my, and, America, Russia. ( ) 2、are, a, nice, friend, you. ( ) 3、you, from, are, America? ( ) 4、your, customers, from,...
【多选题】垄断竞争厂商达到长期均衡时:
A.
超额利润 = 0
B.
P>LMC
C.
超额利润 > 0
D.
P>LAC
【简答题】C. Now listen to some tips for foreigners on how to do online-shopping in China. Listen carefully and supply the missing information to complete the summary China has a number of its own mature ______...
【多选题】垄断竞争厂商达到长期均衡时
A.
超额利润=0
B.
P>LMC
C.
d与D曲线相交
D.
P>LAC
【单选题】A Foreign Trade Talk A company in America wants to import some toys and dolls from China. Mr. Baker, the representative of the American side, was sent to Shanghai to hold a business talk. Mr. Li from ...
A.
Because he has to ask his boss for instructions.
B.
Because he needs to wait for his boss’s arrival.
C.
Because he needs to get permission from his wife.
D.
Because he has to send telegrams to his customers.
【简答题】下列氧化剂:1.KClO3、2.Br2、3.FeCl3、4.KMnO4、5.H2O2,当其溶液中H+浓度增大时, 氧化能力增强的是。(直接写序号,中间不空格也不加标点符号)
【简答题】下列氧化剂:1.KClO3、2.Br2、3.FeCl3、4.KMnO4、5.H2O2,当其溶液中H+浓度增大时, 氧化能力增强的是。(答案只写序号,中间不空格也不加标点符号)
【单选题】当溶液中增加〔 H + 〕时 , 氧化能力不增强的氧化剂是
A.
NO 3 -
B.
Cr 2 O 7 2-
C.
O 2
D.
AgCl
【单选题】当溶液中增加 c (H + ) 时,氧化能力不增强的氧化剂是( )。
A.
硝酸根
B.
重铬酸根
C.
氧气
D.
氯化银
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