用秋水仙素诱发基因突变和诱导多倍体,起作用的时期分别是()
A.有丝分裂的间期和前期
B.有丝分裂的间期和后期
C.有丝分裂的前期和后期
D.有丝分裂的前期和后期
参考答案:A
银行控股公司是指一家银行公司控制一家或多家银行或公司的股权的集团公司。()
Poor preparations and shortage of equipment ______ their failure of climbing to the top of the mountain. [ ]
A. resulted from
B. brought out
C. accounted for
D. approved of