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【单选题】
金银花的花粉粒为( )A.
球形，黄色，外壁具细刺状突起
B.
略呈三角形
C.
圆球形，表面近光滑
D.
类球形，外壁有条状雕纹，自两极向四周呈放射状排列
E.
赤道面观为双凸透镜形，极面观为略呈三角形
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举一反三
【单选题】Nobody yet knows how long and how seriously the shakiness in the financial system will ______ down the economy.
A.
put
B.
settle
C.
drag
D.
knock
【单选题】Despite decades of scientific research, no one yet knows how much damage human activity is doing to the environment. Humans are thought to be responsible for a whole host of environmental problems, ra...
A.
Global warming.
B.
Ozone depletion.
C.
Species extinction.
D.
All of the above.
【简答题】A．Ho has not been to the new restaurant yet. B．He would like to go to the new restaurant with the woman. C．The food at the new restaurant is not very good. D．A restaurant's atmosphere is very importan...
【单选题】—The meeting is about to start, yet the speaker hasn’t turned up. — No one knows ____.
A.
what the matter is
B.
what is the wrong
C.
what is the matter
D.
how matter stood
【单选题】Nobody yet knows how long and how seriously the ______ in the financial system will drag down the economy.
A.
shallowness
B.
shakiness
C.
scantiness
D.
stiffness
【单选题】Nobody yet knows how long and how seriously the shakiness in the financial system will ______ down the economy.
A.
settle
B.
knock
C.
put
D.
drag
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