一个最简单的质粒载体必须包括以下几个部分:______、______和______。
参考答案:复制起点 选择标记 克隆位点
设A为n(n≥2)阶方阵,A*是A的伴随矩阵,则下列等式或命题中,正确的是()。
A.AA*=|A|
B.A-1=
C.若|A|≠0,则|A*|≠(0
D.若A的秩R(A_=1,则A*的秩R(A*)=1
Although the Roman couldn’t be forced to pay taxes, they couldn’t vote________they agreed to__________ the government.
A.unless; submit to
B.until; correspond to
C.when; resign to
D.while; compromise to