直接诱导乳糖操纵子转录的物质是
A．葡萄糖B．阿拉伯糖C．半乳糖D．乳糖E．cGMP
参考答案：C
—What did he say just now?
—He asked me______________.
A．when my sister came back
B．when did my sister come back
C．when my sister will come back
D．when my sister comes back
治安管理处罚的种类包括（）。
A、警告
B、罚款
C、管制
D、行政拘留
