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【单选题】
多数表皮的绿色要比下表皮的绿色深一些,其主要原因是( )A.
上表皮含有叶绿体多
B.
上表皮具有角质层
C.
栅栏组织含有叶绿体多
D.
海绵组织含有叶绿体多
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反馈参考答案：
举一反三
【单选题】Training for a marathon requires careful preparation and steady, gradual increases in the length of the runs. ___1___, buy the best-fitting, best-built running shoes you can find. No one can say which...
A.
After six days
B.
For a good marathon runner
C.
Before you begin your training
D.
With each day, increase the distance by a half mile
E.
If they still feel good, you can begin running in them
F.
Time spent for preparation raises the quality of training
G.
Now you are ready to figure out a goal of improving distance and time
【简答题】As the season is rapidly approaching, the buyers ______ our part are badly ______ need of the goods.
【单选题】Training for a marathon requires careful preparation and steady, gradual increases in the length of the runs. ___1___, buy the best-fitting, best-built running shoes you can find. No one can say which...
A.
After six days
B.
For a good marathon runner
C.
Before you begin your training
D.
With each day, increase the distance by a half mile
E.
If they still feel good, you can begin running in them
F.
Time spent for preparation raises the quality of training
G.
Now you are ready to figure out a goal of improving distance and time
【单选题】Our concepts of time and space are in part conditioned by the structure of particular languages.
A.
Y
B.
N
C.
NG
【单选题】While the others are absent you can stretch out your soul until it fills up the whole room.
A.
switch on
B.
extend
C.
throw out
D.
go along
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