影响根部吸收矿质离子的条件主要有()、()、()、()。
参考答案:温度、通气状况、溶液浓度、氢离子溶液
—How are you today?
—____,thank you. [ ]
A. Pretty healthy
B. Very health
C. Pretty well
D. Very much
形成3’,5’环化鸟苷酸时需要()。
A.ATP
B.CTP
C.GTP
D.UTP
E.TTP