问题
选择题
下列合并同类项的计算中,正确的是( ) |
A.3a2﹣2a2=a2 B.3a2﹣2a2=1 C.3a2﹣a2=3 D.3a2﹣a2=2a |
答案
答案:A
下列合并同类项的计算中,正确的是( ) |
A.3a2﹣2a2=a2 B.3a2﹣2a2=1 C.3a2﹣a2=3 D.3a2﹣a2=2a |
答案:A
补全对话。 | ||||
Sarah: Hey, Lucy! Wait! Lucy: Hi, Sarah! How are you? Sarah: Fine, thank you. 1_______ Lucy: I'm on duty today, so I have to go to school earlier to do my work. Sarah: 2_______ Lucy: Today I must water the flowers in our classroom. Sarah: What kinds of flowers do you have? Lucy: 3_______ I like flowers very much. Sarah: 4_______ Can I help you? Lucy: Sure! 5_______ | ||||
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