You’ll find in English some words can be remembered more easily than the others.英You’ll find in English some words can be remembered more easily than the others.英译汉
设S1=12,S2=12+22+12,S3=12+22+32+22+12,…,Sn=12+22+32+…+n2+…+32+22+12,…用数学归纳法证明:公式Sn=n() 3 对所有的正整数n都成立.
根据规定,维修企业的收费标准要向行业管理部门报备,报备的内容包括:工时定额、()和材料进销差价率
Translation :莫言一登上舞台,观众就报以雷鸣般的掌声。 No sooner____ stepped on the stage than the audience broke into thunderous applause.