学进去-教育应平等而普惠
试题
类型:填空题
难度系数:0.65
所属科目:小学英语
根据句子提示用所给的词的恰当形式填空。
1. My parents __________ (have; had) a birthday party for me every year.
We __________ (have; had) a party for mothers yesterday.
2. Tom __________ (sing; is singing). Can you hear?
I can __________ (sing; is singing) a lot of English songs.
3. Now Sam __________ (played; is playing) the violin.
I __________ (played; is playing) in a concert last weekend.
4. At the end of the concert, people __________ (clapped; are clapping). I was happy.
Listen, the people __________ (clapped; are clapping). They are very happy.
5. He often __________ (writes; is writing) letters to his friends.
Daming __________ (writes; is writing) a letter to his friend now.
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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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