Mrs. Obama introduced the Let’s Move _______ yesterday. Its goal is to reduce children obesity(肥胖) today and in the future.

A．challenge

B．battle

C．campaign

D．behavior

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