豆科植物共生固氮作用有3种不可缺少的元素,分别是()
A、硼、铁、钼
B、钼、锌、镁
C、铁、钼、钴
参考答案:C
中药材在储存时,室内相对湿度应
A.不超过45%B.不超过60%C.不超过75%D.不低于45%E.不低于60%
()is just to put it()and notify me as to where and how the cargo was damaged.
A.What you ought to do with the damaged cargo/aside
B.What you should do with the damaged cargo/beside
C.What will you do with the damaged cargo/beside
D.What have you to do with the damaged cargo/side by side