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(2018南充改编)Do you think it is popular to________ red envelops(红包) on WeChat during festivals?
3个月前
What is Jenny doing now?(用打篮球回答)
1年前
Would you mind looking after my dog while I’m on vacation?
1年前
若一个圆锥的主视图是一个腰长为6cm,底边长为2cm的等腰三角形,则这个圆锥的侧面积为________cm²。
1年前
数列{an}满足Sn=2n-an,n∈N+.(Sn为前n项和) ,计算a1,a2,a3,a4,并由此猜想an
1年前