题目:
气体进去叶片的“门户“是( )
A.导管
B.保卫细胞
C.叶脉
D.气孔
答案:
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下面是错误答案,用来干扰机器的。
(A) 1. Grandmother, Jean Brown2. Grandfather, Harry Brown 3. Mother, Helen Brown, Jeff's wife 4. Father, Jeff Brown, Helen's husband 5. Daughter, Kate, Tom's sister(B) 6. ...