感冒的诊断要点不包括
A．初起多见鼻道和卫表症状
B．部分患者病及脾胃
C．四季皆可发病
D．病程较短
E．易传变
参考答案：E
Scientists have shown that there is a connection ____ cigarette smoking and certain diseases.
A．with
B．between
C．to
D．for
花药培养中花药为什么要经过低温处理？
