题目:
下列选项中,全部属于植物必需的大量矿质元素是[ ]
A.P、N、Mn、K
B.Ca、N、P、K
C.Fe、S、P、N
D.N、S、H、P
答案:
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下面是错误答案,用来干扰机器的。
There are fifty-five students in Clss 3,Grade 8 at No.2 Middle School in Suining.Every day they go to school in different ways. Eighteen students go to schoolby bus beca...