题目内容
She is learning French in evening classes.
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He has just learned how to do kayaking.
He is learning how to play a musical instrument.
请注意答案的单词需要区分大小写！1. The most difficult thing 1)________ is Mandarin Chinese. I did it in evening classes a few years ago and I 2)________ it really, really difficult.2. Probably capoeira, which is a Brazilian dance, martial art, fight thing. It's 3)________ of all these things. And yes, that was very difficult because there were lots of unusual 4)________ to learn.3. 5)________ was the most difficult thing.4. Well, I learned some Sanskrit, and that's got um, 6)________, two more than Latin. It's quite difficult 7)________.5. I think I found 8)________ very hard at school.6. Um, I learned to play the trumpet at school. That was pretty difficult. Er ... and maybe learning to drive. I 9)_______ learning to drive.
行列式的定义中列指标的排列偶排列时该单项式为正，奇排列时为负。
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