一定一定要对的 ， 不会的别回答 谢谢 第二张 1 2 3 4 5 6 点。 一定一定要对的
来自：大全 更新日期：早些时候
1-1/2+1/3-1/4+1/5-1/6....=?~
2.The brakes are tested.
3.The filters are replaced.
4.Air is put in the tyres.
5 The battery is checked.
6.The lights are tested.
7.Broken parts are repaired.
8.It is taken for a test drive.
9. The radiator is filled with water.
(2)
2.They are being put in place, Mr. Sullivan.
3.They are being called , Mr. Sullivan.
4.They are being checked, Mr. Sullivan.
5.They are being turned on, Mr. Sullivan.
(3)
2.Yes, a piece of material was found this morning.
3.Yes, they were interviewed last night..
4.Yes, they were questioned this morning.
5.Yes, two men were arrested yesterday evening.
6. Yes, they were interrogated last night.
7. Yes, they were recovered this morning.
8.Yes, it was completed an hour ago.
(4)
2. New windows have been put in.
3.A garden pond has been made.
4.The tree has cut down.
5.A lot of flowers have been planted.
6.The old gate has been replaced.
(5)
2. Well , I hope to be given.
3.Well, I hope to be paid.
4.Well, I hope to be sent.
5. Well, I hope to be introduced.
6.Well, I hope to be asked.
7. Well, I hope to be given.
(6)
2.was made
3.is being typed
4.has already been made
5.will be picked up
6.is being repaired
7.hasn't been delivered
8.will be opened
一定一定要对的 ， 不会的别回答 谢谢 第二张 1 2 3 4 5 6 点。 一定一定要对的视频
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解：把ln（x+1）按泰勒级数展开得ln（x+1）=x-(1/2)x^2+(1/3)x^3-(1/4)x^4+......
取x=1，则1-1/2+1/3-1/4+1/5-1/6.....=ln2。
1+2+3+4+5+6+......+50是一个等差数列求和的问题
首项为1，公差为1，共有50项
所以由等差数列求和公式Sn=n(a1+an)/2可得
1+2+3+4+5+6+......+50=50*（1+50）/2=1275
2.The brakes are tested.
3.The filters are replaced.
4.Air is put in the tyres.
5 The battery is checked.
6.The lights are tested.
7.Broken parts are repaired.
8.It is taken for a test drive.
9. The radiator is filled with water.
(2)
2.They are being put in place, Mr. Sullivan.
3.They are being called , Mr. Sullivan.
4.They are being checked, Mr. Sullivan.
5.They are being turned on, Mr. Sullivan.
(3)
2.Yes, a piece of material was found this morning.
3.Yes, they were interviewed last night..
4.Yes, they were questioned this morning.
5.Yes, two men were arrested yesterday evening.
6. Yes, they were interrogated last night.
7. Yes, they were recovered this morning.
8.Yes, it was completed an hour ago.
(4)
2. New windows have been put in.
3.A garden pond has been made.
4.The tree has cut down.
5.A lot of flowers have been planted.
6.The old gate has been replaced.
(5)
2. Well , I hope to be given.
3.Well, I hope to be paid.
4.Well, I hope to be sent.
5. Well, I hope to be introduced.
6.Well, I hope to be asked.
7. Well, I hope to be given.
(6)
2.was made
3.is being typed
4.has already been made
5.will be picked up
6.is being repaired
7.hasn't been delivered
8.will be opened
对的吗？
当然是对的。
一定一定要对的 ， 不会的别回答 谢谢 第二张 1 2 3 4 5 6 点。 一定一定要对的视频
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