联网收费中IC卡出入库必须做到哪些？
参考答案：
IC卡出入库必须做到认真清点、摆放整齐，正常卡、预制卡和坏卡分类存放。
I was surprised by her words,which made me recognize ______ silly mistakes I had made.
A．what
B．that
C．how
D．which
在基因表达过程中，原核生物所特有，而真核生物没有的物质是
A．σ因子
B．冈崎片段
C．起始密码子AUG
D．tRNA的稀有碱基
