学进去-教育应平等而普惠
试题
类型:听音,选择正确答案
难度系数:0.40
所属科目:小学英语
听录音,根据短文内容选出正确答案,将其序号写在题前括号内,听三遍。
(     ) 1._____, Mr Black liked listening to the radio.
A. Twenty years ago       B. Thirty years ago       C. Forty years ago
(     ) 2. He could listen to the music and get news ______.
A. from the radio       B. from TV       C. on the Internet
(     ) 3. —How old is Mr Black?   
—_____.
A. Thirty years old       B. Forty years old       C. Sixty years old
(     ) 4. —What does Mr Black like doing on the Internet?
—He likes _____.
A. playing games       B. reading e-books       C. drawing
(     ) 5. —Are Mr Black’s eyes good now?
—______.
A. No, he isn’t       B. Yes, they are       C. No, they aren’t
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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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