容易混淆的辅音 1) [v] [w] vet wet; vest west; vine wine; very well 2) [s] [ ] sink think; sort thought;——青夏教育精英家教网—

摘要：容易混淆的辅音 1) [v] [w] vet wet; vest west; vine wine; very well 2) [s] [ ] sink think; sort thought; miss myth; mass math 3) [z] [ ] closing clothing; breeze breathe; bays bathes 4) [n] [ ] thin thing; sin sing; ban bang win wing; ran rang

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在测定“小灯泡的电功率”的实验中，已知电源电压为6V，小灯泡的额定电压为2.5V，小灯泡的电阻约为10Ω，滑动变阻器上标有“20Ω 1A”字样．左图是小向同学没有连接完的实物电路。

（1）请你用笔画线代替导线，将实物电路连接完整；
（2）实验中，小向同学连接好电路后，闭合开关，移动滑片，发现小灯泡始终不亮，且电压表有示数，电流表无示数，则故障的原因是                             ；
（3）故障排除后，闭合开关，移动滑动变阻器的滑片到某一位置，电压表的示数如右图甲所示，此时电压为      V，要测量小灯泡的额定功率，应将滑片P向     端滑动（选填“左”或“右”）；
（4）当小灯泡正常发光时，电流表的示数如图乙所示，则小灯泡的额定功率是     W。查看习题详情和答案>>

American and British people both speak English, but sometimes it doesn’t seem like the same language.

First of all, they sound very different. Often, Americans don’t say all the letters in each word, especially consonants （辅音） like “t” and “d.” For example, Americans may say “I dun no” instead of “I don’t know”. However, the British usually pronounce their consonants more carefully.

Also, some letters have different sounds. For example, Americans say the “a” in “half” like the “a” in “cat,” but the British say the “a” in “half” like the “a” in “ash.”

Sound is not the only difference between British English and American English. The two languages have different words for some things. For example, the words for clothing are different. Americans use the word “sweater,” but the British say “jumper.”

Many other words and expressions are different in the two countries. In England, if you are going to telephone a friend, you “ring her up.” In America, you “give her a call.” The British use the word “lovely” to describe something they like. Americans use the word “cool” or “great”.

There are also some differences in grammar. For example, Americans almost always use the helping verb “do” with the verb “have.” They might say “Do you have an extra pen?” The British often ask the question in a different way. They might say “Have you got an extra pen?”

These differences can be confusing（令人混淆的） if you are learning English. But there is a reason for the differences. Languages change over time. When the same language is used in different places, it changes differently in each place. This is what happened to English. It also happened to other languages, such as French. Many people in Canada speak French, but their French is different from the French spoken in France.

1．Do Americans say all the letters in each word?

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2．Who use the word “sweater”, Americans or the British?

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3．Is French the same in Canada and France?

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4．Why are there some differences in the same language?

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5．What is the main idea of the passage?

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