调配罂粟壳时不得单包，必须混入群药，防止变相套购。
参考答案：对
______, I believe, and you will find the boy is very outgoing.
A. Having a talk with the student
B. One talk with the student
C. Given a talk with the student
D. If you have a talk with the student
简述冻结速度与冰晶分布状况的关系？
