第一笔1000万贷款，3年后收回1500万，第二笔2000万贷款，5年后收回3600

收费人员要严格按标准收费、不徇私情，做到"应征不漏、应免不征"，不弄虚作假。

若-7x^m+2y²与-3x³yⁿ是同类项，则m-n=______．

承担法律责任的是法律关系中的主体，为自然人或企业、事业等用人单位，中介组织、临时性组织和政府有关部门不包括在内。

Man: How well are you prepared for your presentation Your turn comes next Wednesday.
Woman: I spent a whole week searching on the net, but came up with nothing valuable.
Question: What did the woman say about her presentation（）。

A. It has nothing to do with the Internet.

B. She needs another week to get it ready.

C. It contains some valuable ideas.

D. It’s far from being ready yet.

染色体和染色质是同一物质不同的功能状态。