单项选择题
“菊之品凡百种宿根自生茎叶花色品品不同”的正确断句处是
A.凡
B.根
C.生
D.叶
E.品
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单项选择题
Use 20g and distil at a rate of 2.5ml to 3.5ml Per minute for 5 hours.实验中蒸馏提取的速率是()
A.每5小时2.5ml一3.5ml
B.每小时2.5ml~3.5ml
C.每5小时12.5ml-17.5ml
D.每小时150ml--210ml
E.以上均不对
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单项选择题
下列备选答案中表示植物根或茎中“下皮层”的是
A.endodermis
B.cortex
C.exodermis
D.epidermis
E.hypodermis
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