题目内容

肥料施得越多，种类越多，植物产量就越高。

A. 对
B. 错

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植物必需营养元素的种类及其判定条件有哪些？

根外营养的特点？

When ________ to the party, he was very happy and accepted it.

A. inviting
B. to be invited
C. invited
D. having invited

Here is too noisy for us ________.

A. to talk
B. talk
C. talking
D. talked