学进去-教育应平等而普惠
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所属科目:小学语文
【汉字听写大赛】安阳是“文字之都”,欢迎你来参加“汉字听写大赛”:下列每组词语中,字音或字形都有一个是错误的,请你找出并改正。
(1)A.婢(bì)女                    B.一哄(hòng)而散     C.戛(gá)然而止                                                               
(2)A.入场券(quàn)     B.叱咤(chà)风云        C.一曝(pù)十寒                                                                
(3)A.抽屉                                        B.干燥                                               C.轻歌漫舞       D.技高一筹                                           
(4)A.拥戴                                        B.洒脱                                               C.自做自受       D.全神贯注                                           
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

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2019-09-19

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19
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