通常所说的SNP包括()
A.由单个碱基的缺失所致
B.单个碱基的颠换所致
C.以上都不对
D.单个碱基的转换所致
E.由单个碱基的插入所致
参考答案:B, D
什么是手动火灾报警按钮?如何检查手动报警器?
----What _______ the children be doing?
----They _______ be playing a game called Bingo.
A.might; can
B.can; might
C.might; might
D.can; can