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
下列关于承担责任的说法中错误的是[ ]
A.是自尊自信的具体表现
B.意味着付出
C.是自立自强的必然选择
D.是只有履行义务,没有获得回报的权利
Had the US Airways captain not guided his jet to a safe landing on the Hudson River, just west of New York, over 100 people aboard ______, along with many more on the ground.
A.might have died
B.needn’t have died
C.must die
D.shouldn’t die