Viết bài văn nêu cảm nghĩ của anh,chị về dấu "," .
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
Đề thi đánh giá năng lực
![](https://rs.olm.vn/images/avt/0.png?1311)
a, Ta có (AC;AB) = ^BAC
tan^BAC = BC/AB = 1 => ^BAC = 450
b, Ta có BD // B'D'
=> (AD';BD) = (AD';B'D') = ^AD'B'
Xét tam giác AD'B' ta có AB' = B'D' = AD'
=> tam giác AD'B' đều => ^AD'B' = 600
c, Ta có BD vuông AC ; BD vuông CC'
=> BD vuông (ACC')
Mà AC' thuộc (ACC') => AC' vuông BD
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
1 didn't help, the car couldn't start.
2 you sleep enough tonight, you will be exhausted tomorrow.
3 you disagree with me, I will stand by my opinion.
1 If he didn't help, the car couldn't start
2 Unless you sleep enough tonight, you will be exhausted tomorrow
3 Even if you disagree with me, I will stand by my opinion
![](https://rs.olm.vn/images/avt/0.png?1311)
1 But for his useful information, I would have made a wrong decision.
2 But for his intervention, the accident might have been much worse.
But for his useful information, I would have made a wrong decision
But for his intervention, the accident might have been much worse
Tick me please?:(
![](https://rs.olm.vn/images/avt/0.png?1311)
có ngữ liệu để làm không ạ