单项选择题
植物蒸腾作用主要是通过植物叶片上的( )进行的。
A．角质层
B．叶肉细胞
C．气孔
D．保卫细胞
植物蒸腾作用主要是通过植物叶片上的( )进行的。
A．角质层
B．叶肉细胞
C．气孔
D．保卫细胞
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单项选择题
But as soon as the stranger begins to intrude his ______(偏见) , his definitions, his defects, into the conversation, it is all over.
But as soon as the stranger begins to intrude his ______(偏见) , his definitions, his defects, into the conversation, it is all over.
A．part
B．partial
C．partialities
D．partially