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Jing Xuan is excited about lessons like Chinese, English and math. She3． (enjoy) the pictures and animations(动画）in the E-textbooks. The children here 4． (study) with E-textbooks since last September
With the help of the E-textbooks, some good ideas 5． (share) at times. Some parents encourage their children 6． (try) the E-textbooks to make learning easier. But others worry about their children’s health.
“You can’t imagine how the growing popularity of E-textbooks is changing the way the students learn! More and more students 7． (learn) with E-textbooks in the future. However, there’s still a long way to go.” said the headmaster.
同类型试题
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
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
