Một tế bào ở vùng sinh dục thực hiện nguyên phân 3 đợt sinh ra tế bào con đi vào vúng chín và thực hiện giảm phân,hình thành giao tử.

1.Nếu tế bào ở vùng sinh dục cái thì số giao tử sinh ra là bao nhiêu?

2.Nếu tế bào ở vùng sinh dục nam thì số giao tử sinh ra là bao nhiêu?

cho tam giác abc vuông tại a đường phân giác ad đường cao ah.Biết bd=7,5cm,dc=10cm.tính ah,bh,hd

Mk đã làm ra đáp án và cần đối chiếu

Cho hình thang vuông ABCD, góc A = góc D = 90 độ. đáy AB=7 cm. AD=4cm,CD=4cm. a)tính BC b)trên AD lấy E sao cho CE=BC. tính diện tích tứ giác ABCE c)AD giaoBC tại S. Tính SC d)Tính góc B và góc C.

Mọi người giúp e với ạ e cần gấp

Turn the following sentences into passive

1.People believe that he was the first man to land on the moon.

2.He doesn't like people looking at him while he performs.

3.They made us work hard yesterday.

4.We suppose that you will be at the meeting in time this time.

5.Don't use the elevator in case of a fire.

6.We will have to get a plumber to fix the pipe.

7.They found that the visiting team had cheated.

8.They say that Jenny is the brightest student in the class.

9.People believed that the Earth stood still.

10.No one believes his story.

11.Are you police making inquires about the thief.

12.They declared that she won the competition.

13.The speaker reported that the President had suffered a heart attack.

14.They think that he had died a natural death.

15.We will continue to use these computers.

16.He dosen't like people to ask him stupid question.

17.Write your name on this piece of paper.

18.They let us go out.

19.I had him repair my bicycle yesterday.

20.They saw her come in.

21.She hates peple staring at her.

22.John gave me a nice present.

23.I bought my mother some flowers.

24.Will you invite her to your wedding praty?

25.Have they mended the window of the laboratory?

Turn the following sentences into passive

1.People believe that he was the first man to land on the moon.

2.He doesn't like people looking at him while he performs.

3.They made us work hard yesterday.

4.We suppose that you will be at the meeting in time this time.

5.Don't use the elevator in case of a fire.

6.We will have to get a plumber to fix the pipe.

7.They found that the visiting team had cheated.

8.They say that Jenny is the brightest student in the class.

9.People believed that the Earth stood still.

10.No one believes his story.

11.Are you police making inquires about the thief.

12.They declared that she won the competition.

13.The speaker reported that the President had suffered a heart attack.

14.They think that he had died a natural death.

15.We will continue to use these computers.

16.He dosen't like people to ask him stupid question.

17.Write your name on this piece of paper.

18.They let us go out.

19.I had him repair my bicycle yesterday.

20.They saw her come in.

21.She hates peple staring at her.

22.John gave me a nice present.

23.I bought my mother some flowers.

24.Will you invite her to your wedding praty?

25.Have they mended the window of the laboratory?

26.How many games has the team played?

27.Who are they keeping in the room?

28.Who looked after the childen for you?

29.The teacher gave each of us two esercise books.

30.People believe that 13 is an unlucky number.

31.I have heard her sing this song many times.

32.People saw him stole your car.

33.The teacher is watching us work.

34.We wont't let you do that silly thing again.

35.The manager don't make the employees work hard.

36.on't make the same mistake.

37.Let's tell them about it.

38.She advised me to sell that house.

39.You must see it to believe it.

40.He orders us to clean the floor.

41.You need to have your har cut.

42.We enjoy writing letters to each other.

43.Take off your hat and put on the helmet whenever you ride a motorbike.

44.Maria has the porter carry her luggage to her car.

45.Ellen always helps me to do all the difficult exercises.

Mn giúp mk nha(Mk cần có lời giải thích mỗi câu hoặc k có thì thôi)

chuyển từ câu chủ động sang câu bị động:

1.After class,one of the students always erases the chalkboard.

2.They told the new pupil where to sit.

3.I knew that they had told him of the meeting.

4.Nobody has ever treated me with such kindness.

5.I had him repaint my house last weekend.

6.We got the waiter to serve us dduring the dinner.

7.People began to plant rubber trees in big plantations.

8.He gave up the search after 3 hours.

9.Don't speak until someone speaks to you.

mn giúp mk gạch chân vào S,V,O(chủ ngữ,động từ,tân ngữ)trong câu rồi hãy chuyển.

a, Giải hệ phương trình:  3 x - 2 y + 1 = 1 5 x + 2 y + 1 = 3

b, Cho phương trình  x 2  – (m – 1)x –  m 2  – 1 = 0 với x là ẩn và m là tham số. Tìm m để phương trình có hai nghiệm phân biệt  x 1 ,  x 2 thỏa mãn  x 1 + x 2 = 2 2

Tìm x:

a)  1 5 27 + 3 x − 7 9 3 = 24 27

b)  2 x − 1 2 = 3 4

c)  2 x − 1 3 + 5 6 = 1