为什么不能除以零？ - TED-Ed：英语精读讲义

用本课完全相同的话题限定框架补全开场句：____ robotics, even tiny errors can matter.

一名游戏设计者重新规定了计分方式。哪句话准确描述了这种情况？

1. The designer decides to change the rules.
2. The designer decides to follow the rules.
3. The designer decides to break the rules.

用被动警告结构补全句子：For safety, visitors ____ enter the closed area.

哪个短语正确读出了算式 18 ÷ 6？

1. eighteen divided into six
2. eighteen divided by six
3. six divided by eighteen

下面哪个开场问题最恰当地用 How can...? 引出一个可以通过解释来回答的意外谜题？

1. Where is the packet of seeds?
2. How can a tiny seed grow into a tree taller than a house?
3. Can you put this seed in the blue pot?

用表示“越来越响”的重复比较级结构补全句子：The music grew ____ as the parade came closer.

在这组连续算式中，By 1 millionth 补充完整后是什么？

1. 10 multiplied by 1 millionth
2. 10 divided by 1 millionth
3. 1 millionth divided by 10

用本课表示“列举还会继续”的短语完成句子：We need paper, pencils, folders, ____.

哪句话把某个条件呈现为暂时推断，而不是已经证明的事实？

1. We have proved that every battery runs down faster in the cold.
2. It seems like if the battery gets colder, it runs down faster.
3. Every battery definitely runs down faster in the cold.

用 keep + changing 的正确形式补全句子：The weather ____ throughout the day.

请用本课短语完成句子，该短语表示“经历完整的下降范围，直到零”：The gauge fell ____.

这句话中的否定疑问句主要传达什么？

1. 它没有暗示任何答案，只是开放地询问。
2. 它把无穷大说成说话人预期听起来很自然的结论。
3. 它证明了除以零等于无穷大。

哪句话表示一个解释听起来合理，但尚未得到证实？

1. The explanation is certainly true, so no evidence is needed.
2. The explanation may sound plausible, but we still need evidence.
3. The explanation is easy to hear, but hard to understand.

一个脚印只能说明有人来过，却不能说明是谁。哪句话把结论限制在证据范围内？

1. We know exactly who was here.
2. All we really know is that someone was here.
3. The footprint proves that nobody was here.

一个数值越来越接近零，但可能永远不等于零。哪句话表达得最准确？

1. The value tends towards zero.
2. The value moves away from zero.
3. The value is equal to zero.

用高亮框架补全句子：The forecast says rain is possible. That is ____ it will definitely rain.

用 be equal to 结构补全等式：Twelve divided by three ____ four.

用目标表达 take a closer look at 补全邀请：Let's ____ the evidence.

请用询问所需重复次数的短语补全问题：____ must we add 4 together to make 20?

哪句话明确表示一个过程会反向还原另一个过程？

1. Unzipping a jacket is similar to zipping it up.
2. Unzipping a jacket happens after zipping it up.
3. Unzipping a jacket is the reverse of zipping it up.

在说明“Choose a given value for x”中，given 是什么意思？

1. 一直在变化
2. 事先指定或选定
3. 作为礼物收到

哪个句子表示撤销修改后恢复了原来的状态？

1. Undoing the update got us back to where we started.
2. Undoing the update moved us to a new stage.
3. Undoing the update forced us to start from scratch.

哪个数是 5 的乘法逆元？

1. 0
2. -5
3. 1/5

请用本课的四词短语补全句子；这个短语用于温和地引导听众注意可观察到的特征：____, both bars reach the same height.

用表示乘法结果的名词补全数学句子：The ____ of 4 and 3 is 12.

补全“目标—必要行动”框架：If we want to protect our passwords, we ____ keep them private.

请用本课的确切结构 such a number that 完成这个数学描述：We need ____ doubling it gives twelve.

下面哪个完整关系从句与 anything multiplied by zero 意思相同？

1. anything that multiplies zero
2. anything that has multiplied zero
3. anything that is multiplied by zero

请用表示“三角形没有第四条边”的准确 has no + 名词短语完成句子：In ordinary geometry, a triangle ____.

在讨论中，说话人问 Does that really settle things though? 是在做什么？

1. 确认讨论肯定已经结束
2. 质疑之前的结论是否彻底解决了问题
3. 请某人把几个物品排列好

哪句话中的 after all 引出了支持前一句话的事实？

1. We cleaned the room after all.
2. We should ask Leo for help; after all, he has fixed this problem before.
3. After all the meetings, we finally made a decision.

用过去时的 no such thing as 结构补全句子：In 1900, ____ online banking.

使用 take + the square root + of 这一结构补全指令：To find the side length, ____ 81.

使用 define X as Y 和 called 补全定义及命名句：We ____ a polygon with three equal sides ____ a special triangle ____ an equilateral triangle.

哪一句中的 opened up a whole new world of 表示“出现了许多新的可能性”？

1. Learning sign language opened up a whole new world of communication for Amir.
2. Amir opened the kitchen window.
3. Amir opened up a box of old photographs.

请用表示 a + bi 形式数字的标准数学术语完成句子：Numbers such as 3 + 2i are called ____.

请用表示“想出一条新规则”的重点表达完成句子：Before our new game begins, let's ____.

哪一句中的 Say 用来引入临时假设？

1. Say the number five clearly.
2. Say that each box weighs five kilograms. What do four boxes weigh?
3. Lena said that each box was heavy.

请用本课中意为“观察未知结果”的三个词表达完成句子：Let's change one setting and ____.

哪一句明确表示主句主语就是进行 imagining 的人？

1. The problem appeared on the screen, imagining that we knew nothing about the usual solution.
2. Imagining that we knew nothing, the answer surprised us.
3. We explored the problem, imagining that we knew nothing about the usual solution.

用表示“以定义为依据”的目标短语补全句子：____ a square, we know that it has four equal sides.

哪句话最明确地表示“根据规则，这个结果在逻辑上是必然的”？

1. The result must be equal to ten.
2. The result should be equal to ten.
3. The result is equal to ten.

请用 should equal 完成句子，表达预期结果：After counting both teams' points, the total ____ thirty.

请用 by + 规则名称完成说明：____, 3(x + 2) = 3x + 6.

请用 can + rearrange 的被动形式 + to 完成句子：The equation ____ x = 6.

请使用表示“化简为”的确切口语短语完成句子：After combining like terms, the expression ____ 3x.

哪句话用 while 对照两个相互冲突的结论？

1. The first report says the road is open, while the second says it is closed.
2. While the printer was running, I answered an email.
3. We waited inside while the storm passed.

请用由 odd 构成、表示结果出人意料的固定两词短语完成句子：____, the old battery lasted longer than the new one.

“The plan is not necessarily wrong” 表示什么？

1. 这个计划肯定是错的。
2. 这个计划肯定是对的。
3. 这个计划可能错，也可能没错。

哪句话把判断限制在一个领域内，而没有表示它在所有地方都不成立？

1. Ordinary arithmetic is not a true rule.
2. The rule is not true in ordinary arithmetic.
3. The rule is never true in any system.

请用表示“按照数学规则可以接受”的两个英文单词完成句子：This unusual proof is ____.

哪句话使用 if + 过去式提出非事实条件，并用 would 给出结果？

1. Because the map was accurate, we reached the hotel.
2. If this map is accurate, we can follow it.
3. If every map were perfectly accurate, travelers would never get lost.

请用本课所学、表示“没有预想的那么有用”的四词短语完成句子：The extra feature looks impressive, but it is ____ for most users.

句中的名称 the Riemann sphere 指什么？

1. 一条允许在普通算术中除以零的规则。
2. 一个用来演示除法的普通实体球。
3. 一种在复平面上增加无穷远点的数学模型。

说话人想暂时略过一个不紧急的细节，继续主要讲解。哪句话最自然？

1. How the machine learned that trick is a story for another day.
2. How the machine learned that trick is a story from the other day.
3. How the machine learned that trick is a story on another date.

选择最合适的过渡语：The software update will finish in an hour. ____, you can back up your files.

1. For the time being
2. In the meantime
3. At the same time

“The experiment didn't work out so great.” 表示什么意思？

1. 实验结果令人失望。
2. 实验涉及体育锻炼。
3. 实验非常成功。

请用 stop + 人 + from + -ing 结构补全句子：One mistake shouldn't ____.

用 experiment with + rearrange 的正确形式补全句子：The team is ____ the pieces to see what works best.

用 to see if... 这一目的结构补全句子：Let's test the materials ____ build a stronger bridge.

在下面的句子中，new worlds 最可能表示什么？A good story gives readers new worlds to explore.

1. 新的思想和想象中的可能性
2. 新发现的行星
3. 用来存放书籍的新房间

用本课学到的复合形容词补全句子：The science show presents a ____ idea that challenges everything we assume about time.