学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.85
所属科目:小学英语
Listen and choose.下面五个小题中,每题有三个单词。仔细听录音,请把你所听到的单词选出来,并将其字母标号填入题前括号内。每个句子读两遍。
(     ) 1. A. clear                        B. clean                           C. clever
(     ) 2. A. shirt                        B. shorts                           C. skirt
(     ) 3. A. you                        B. your                           C. yours
(     ) 4. A. grass                      B. grapes                           C. green
(     ) 5. A. twentieth               B. twelfth                             C. thirtieth
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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

用户名称
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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