免费可打印练习单 - 第 2 页

In one invented classroom test, students compared a flat paper bridge with an accordion-folded bridge. They used sheets of the same size and paper type. Each sheet rested across the same gap between two books. Students added identical blocks one at a time until each bridge could not support another block. The flat bridge supported one block; the folded bridge supported four. The class recorded only one trial of each design. They wrote a conclusion about this test and planned to repeat it before making a broader claim.

示例：另一项虚构种子测试中，两盆种子光照相同。A盆5天发芽，B盆7天发芽。清晰的说明应包含过程、两项结果和“in this trial”的限定；一次测试不能证明结果总是如此。根据材料完成各项任务，按要求作答。

1.比较了哪两种设计或表面？测量的是什么？ What two designs or surfaces are compared? What is measured?

练习预览

三年级

答案

写一段说明文字

练习 · 独立完成 · 30 分钟

围绕“写一段说明文字”，整合探索、练习与应用任务。关联单元提供学习目标与教学建议。

选择另一套练习

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事实、观点与证据

公园阅读角

虚构的练习数据或情境，并非真实研究报告。

Our class visited a small park to choose a place for outdoor reading. We counted twelve trees and two benches. One bench stood under a tree; the other was beside the sunny path. During our ten-minute visit, two walkers used the path. A classmate said, "I think the shaded bench is the best place to read because the pages are easier to see there." Another classmate preferred the sunny bench. We did not visit any other parks. Our notes describe this visit, not every park in town.

示例：“Three books are on the shelf”可以通过计数核实；“Adventure books are the most exciting”是个人判断。三本书的数量不能证明这种判断。根据材料完成各项任务，按要求作答。

1.抄写一个可以在参观或活动中核实的数量。 Copy one count that could be checked during the visit or activity.

练习预览

三年级

答案

事实、观点与证据

练习 · 独立完成 · 30 分钟

围绕“事实、观点与证据”，整合探索、练习与应用任务。关联单元提供学习目标与教学建议。

选择另一套练习

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清楚地用英语寻求帮助

分类任务

Teacher: Put the story cards in time order. Learner: Could you repeat the direction, please? Teacher: Put them in order from first to last. Learner: Does “order” mean the order of events? Teacher: Yes. Start with the event that happens first. Learner: Thank you. Could you check my first card?

示例：“Could you explain?”礼貌但宽泛；“Could you explain where to write the date?”指出了不清楚的部分。有用的回应应回答该部分，而不是重复无关指令。根据材料完成各项任务，按要求作答。

1.老师的第一项指令是什么？ What is the teacher’s first direction?

练习预览

三年级

答案