学进去-教育应平等而普惠
试题
类型:任务型阅读
难度系数:0.40
所属科目:小学英语

In the science laboratory

Jenny is in the science laboratory at a school. She is sitting next to Dean. Jenny and Dean are in the same science class.

Jenny likes science. She likes Mrs. Bennett, the science teacher. She likes learning about different chemicals (化学品). The chemicals are in small test tubes (试管) and flasks (烧瓶). There is a lot of special equipment (设备) in the science lab.

Jenny and Dean are wearing special glasses. These glasses protect their eyes. Jenny is adding a chemical to a flask. The flask is on a burner (燃烧器). The burner makes the flask and the chemicals hot. Mrs. Bennett is watching Jenny.

Jenny and Dean make notes. They answer some questions about the chemicals. They write the notes and the answers in their notebooks.

1.看图写单词或词组。
burner             flasks             chemicals            test tubes

(1) ____________
(2) ____________
(3) ____________
(4) ____________
2.填空完成Jenny的上课笔记。
Date: Monday, March 5
Subject: _______
Teacher: Mrs. _______
Room: Science _______
Equipment: test _______, flasks and a _______.
Today I am working together with _______. We are studying different _______.
We are both wearing special _______ to protect our eyes.
We are going to add different chemicals to the flasks. Then we will use the_______ to heat the chemicals. We watch the chemicals and make _______ about what happens.
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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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