下列关于细胞冻存及复苏过程的描述不正确的是（）。 A.冻存的细胞提前一天更换全部培养

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A debate is a discussion about a subject on which people have different views. It’s a nice way of gaining a lot of knowledge and views on a topic, or situation that we aren’t either aware of, or haven’t really looked into in detail. It makes you more able to think critically and more confident in speaking. In addition, it helps in appreciating tolerance of others’ opinion and improves your listening skills.
A debate requires one to know how to use words and intelligence to overcome his or her opposing team members. To give great arguments during a debate, first you need to get your facts right. To make what you have in material for a debate contain facts, don’t just depend on the Internet, especially avoid just referring to one website for all your information. You are also required to refer to books, and make sure they’re authors of a high degree, since their materials have reference notes and extensive research projects done on what they are covering.
Second, you should be full of confidence. You need to show that you’re sure of what you’re saying , and point out how flawed their comeback arguments were. The only way to do this is to thoroughly know your material before heading on out to a debate session. Know your statistics, know your statistics, know your history and above all know names, dates and places. Make key notes to refer to. Don’t stammer (口吃), and also don’t level your gaze with your opponent or the rest of them. All this will help you keep confident.
At last, by no means should you lose your calmness, but keep your voice firm and raised enough to sound calm. A good team member should know how to keep his emotions in control as well as keep others under control in his/ her team.