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【简答题】
设a，b是群G中阶分别为m与n的两个元素．证明：若ab=ba，则 |ab||[m，n]， 其中[m，n]是m与n的最小公倍数，而且G中有阶为[m，n]的元素．
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【简答题】Who (sing) ________ in the next room? The voice is so beautiful.
【简答题】{东亚及太平洋旅游区简称为_______________,主要包括___________、__________________、__________________以及其他南太平洋岛国和地区。其按经济发展水平主要可分为三种类别:一是经济发达国家________、__________、_________;二是新兴工业国家,如___________、____________;其余为发展中国家。}
【简答题】Who can teach the exchange students (sing) Beijing opera?
【简答题】用所给单词的适当形式填空。 1. We (not go) to the cinema last Sunday. 2. Listen ! Who ( sing) so beautifully? 3. My teacher asked me ____ (clean) the classroom. 4. (not be) late for school next time. 5. —Let's go...
【单选题】Who inspired Hesiod and made him sing songs of gods?
A.
Muses
B.
Gaea
C.
Zeus
D.
Homer
【简答题】阅读理解 People who talk and sing to plants are not crazy, according to Mr. Braymar, an agriculture expert(农业专家). 'In fact, singing and talking to plants makes them grow better,' says Braymar. The reason ...
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