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先做两道题,如遇麻烦,尽可能再理一理思路,如果还不能解决问题,看一看提示,做好后,对一对答案,最后结合命题者的反思,自己也反思一下.
If you are not in a position to solve the problem, take a look at the prompts and do a good job. If you do a good job of answering the question, try to reconsider what you think.