学进去-教育应平等而普惠
试题
类型:完形填空
难度系数:0.65
所属科目:小学英语

Fire safety tips for families

These fire safety tips are very _____ for every family. You can stick them on your refrigerator. They would help to remind you every day.

(1) Have a home fire-escape plan (火灾逃生图) with two ways out of each room.

(2) Choose an outside meeting place. So everyone knows where to go safely.

(3) Have smoke alarms inside each bedroom and outside each sleeping area.

(4) Test your smoke alarms at least _____ a month.

(5) Have a family fire drill (演习) twice a year.

(6) Keep _____ away from the children.

(7) If there’s thick smoke, you should know you must _____ out.

(8) If your clothes are on fire, first stop, then drop, and roll.

(9) Don’t forget to _____ 1-1-9 on the phone.

1.
A.importantB.badC.interesting
2.
A.oneB.onceC.two
3.
A.matchesB.booksC.money
4.
A.danceB.sleepC.crawl
5.
A.callB.writeC.read
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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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