土壤氮素无效化或损失途径有()、()、()、()和()。
参考答案:粘粒对铵的固定、有机质的固定、硝酸根的淋失、氨的挥发、反硝化脱氮
— Let's ____________ English. OK?
— OK. I want to talk ____________ you ____________ that story book. [ ]
A. speak, to, about
B. talk, with, with
C. speak, with, about
This kink of milk________ well . It________ out soon.
A.is sold, sells
B.sells; is sold
C.is sold, will be sold
D.sells, will be sold