Dựa vào quy tắc hóa trị, lập công thức hóa học của hợp chất được tạo bởi a) Mn (IV) và O. b) K (I) và CO3 (II). c) Na (I) và H2PO4 (I).

VII. Use the following verbs to fill in the gaps. Put them in the present simple or the present continous (Sing,want,look after,finish,read,speak,cost,enjoy,wait,sit,understand,study,take,listen,clean,go,watch,brush,pick   1. Janet .....the bus to work everyday. She usually..... for the bus at the corner of 5th and Pine.   2. Margaret.... four languages.   3. Listen! Somebody______.   4. Sandra is tired. She.... to go home now   5. British teenagers (not) ....much but they..... television for over 19 hours a week.   6. Excuse me! But you....in my place   7. I'm sorry, I (not)......Can you speak more slowly   8. How much it.... to phone to New York? 9. The average British person...... his/her teeth for only 20 seconds   10. You can turn off the tadio,I (not)......to it.   11. Nurses..... patients in hospitals.   12. My father usually...... work at 5 p.m.   13. – You... meeting new people? - Yes, in my job I meet a lot of new people.  14. Mike takes three classes this semester. Every morning he.... for two hours before he.... to school.   15. Why are the children so good today? They.... the rooms and....up their toys and the clother toys anh theo clothes from the rest of the house Giúp mik vs ,vs cần gấp

Cho em hỏi bài 1 ạ.Em ẽ vote nhanh nhất

giúp em câu này với ạ x^4+4x^2-5=0

giúp mk vs đc ko ak IV. Rewrite the sentences by using “ Be going to” and the cue given. 1. There isn’t any food at Mrs. Nga’s house. ( go to the market) _____________________________________________________________ 2. Next Sunday is Lan’s birthday. ( invite some friends to her birthday party) ______________________________________________________________

mn giúp e vs ạ đề là tìm gtnn ạ câu c vs câu d a

PO4 trong hợp chất Na3PO4 biết Na hóa trị I. .

V. Give the correct form or tense of the words in parentheses to complete the sentences 1. Nga and Hoa (see)……………… ……………… a movie tonight. 2. Thomas Watson was Bell’s ………………………. . (assist) 3. Would you like (come)………………………to dinner tomorrow? 4. Where……… you (spend)………… your summer holiday last year, Tam? 5. He (have) ______________lots of friends soon. 6. Listen! Jane (play)_________________the piano. 7. We (visit) _____________Huong Pagoda next week. 8. Would you like (see) _______to see_______ a movie? 3. Make complete sentences , using given words 1. He / going / play tennis / this afternoon …………………………………………………………………………… 2. Would / you / leave / her / message ? …………………………………………………………………………… 3. She played video games so much last year, but now she doesn't. => She used to ………………………………………………………….. giúp mk vs mk cần gấp ak

sáng tác một đoạn thơ về gia đình sáng tác chứ đừng chép mạng nhé

tổng của ba số bằng 10 tổng của số thứ nhất và số thứ hai bằng 8,3 . tổng của số thứ 2 và thứ 3 bằng 4,5 . tìm mỗi số