PCR引物设计时，G+C的含量应在（）。
A、10~20%
B、15~25%
C、30~50%
D、40~50%
E、40~60%
参考答案：E
Millie thinks more of others than ____, so we all like to make friends ____ her. [ ]
A. her; with
B. herself; with
C. hers; to
D. she; to
消费者权益保护法规定了哪几种解决争议的途径？
