成组设计(或称完全随机设计)、配伍组设计(或称随机区组设计)中,总变异分别可分解为几个部分()
A.2.3
B.2.2
C.3.3
D.3.2
E.2.4
参考答案:A
将某马铃薯品种的花药进行离体培养获得幼苗,在幼苗细胞中发现了12对染色体,能够确定此幼苗个体属于[ ]
A.单倍体
B.二倍体
C.四倍体
D.多倍体
With the living expense increasing rapidly, I, a fresh clerk in a company, have to take three part-time jobs, which _____ about extra $ 4,000 a year.
A.bring in
B.take in
C.get in
D.put in