R质粒包括（）
A.R决定因子
B.RTF
C.F质粒
D.异染颗粒
E.中介体
参考答案：A, B
气虚发热的病机是
A．外感风寒，卫阳郁闭B．阴液亏损，阳热偏亢C．中气不足，清阳被郁D．外邪入里，阳热内盛
My classmates are all nice _____ me. We always chat _____ each other at lunchtime.[ ]
A. to; with
B. to; to
C. with; to
D. with; with
