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
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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.
用最小平方法配合趋势线的数学依据是（）
A. ∑(Y-YC)=0
B. ∑(Y-YC)2=最小值
C. ∑(Y-YC)2=任意值
D. ∑(Y-YC)2=0
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