拟对多条冠状病毒基因组构建分子 进化树，首先采用何种比对方法？
A. 全局比对
B. 子序列与全长序列比对
C. 最大相似子序列
D. 多序列比对
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多序列比对（n条序列）时，每一步需要考虑的比对路径是多少？
A. n+1
B. 2^n
C. n ^2
D. 2^n-1
多序列比对常用的软件工具有哪些？
A. BioEdit
B. MEGA6.0
C. RasMol
D. Tree
The basic task of sequence alignment？
A. Finding the similarity between sequences;
B. Finding the common pattern between sequences;
C. Distinguish the differences between sequences;
D. Establishing residue–residue correspondence;
E. Finding the functional similarity between genes；
The objective of sequence alignment？
A. Sequence similarity means similar structure and function;
B. predicting structure and function;
C. infer evolutionary relationships;
D. observe patterns of conservation and variability.
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