学进去-教育应平等而普惠
试题
类型:材料作文
难度系数:0.40
所属科目:初中英语

近年来,环境恶化导致的问题日益凸显。假如你是某中学学生会主席李华,请你以学生会的名义向同学们发出倡议,呼吁大家从小事做起,为保护环境尽一份力。


提示:
(1)节约水电;
(2)少用塑料袋,不乱扔垃圾;
(3)绿色出行,如乘公交车、骑自行车、步行上学或购物等。
要求:
(1)文章必须包括所给提示内容,可适当发挥;
(2)文中不能出现姓名、校名等真实个人信息;
(3)词数不少于60,格式已给出,不计入总词数。
Dear friends,
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

The Students’ Union

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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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