【单选题】以下关于PAM矩阵的描述错误的是
A.
PAM250 是PAM1矩阵自乘250次后构建的矩阵
B.
PAM 是基于远源相关的蛋白所构建的可接受点突变矩阵
C.
PAM250 矩阵比PAM1矩阵更适合远源相关的序列比对
D.
PAM1 的生物学意义是,每100个残基中有1个可接受单点突变
【多选题】根据沟通分析理论,沟通中人往往会有三种自我状态,分别是:
【单选题】Alan contracts with Pam to build a shopping mall on Pam's land. Before construction begins, the city enacts a law that makes it illegal to build a mall in Pam's area. Performance of this contract is
B.
temporarily suspended.
D.
discharged on Pam's obligations only.
【简答题】对于4PAM信号和16PAM信号,( )具有较好的抗干扰性能,( )具有较好的频谱效率。
【单选题】如果两条序列相似性为25%,应该选择哪种PAM矩阵( )
【单选题】点P在∠MAN的平面上,现有等式∠PAM = ∠MAN, ∠PAN = ∠MAN, ∠PAM = ∠PAN, ∠MAN = 2∠NAP, 其中能表示AP是角平分线的等式有 [ ]
【单选题】It was brave ________him to jump into the river to save the child and it’s important ________ him to help others.