Bài 1 1/2-(1/3+2/3) 4/9+1/2x2/3 1/2+3/4-(3/4-4/5)

III,complete the sentences by putting the verbs into the past simple tense 1,i (be)...at Lan's house yesterday 2,They (not be)...at school yesterday IV.put the verbs in brackets into the correct form(conditional sentence type 1) 1.i'll go out if it (not rain)... 2.if i(make)...that mistakes again,my teacher(get)...angry with me 3.my dog(bark)...if it(hear)...any strange sound 4They (not/let)...you in if you(come)...late 5.if she(come)...late again,she (lose)... her job 6.if i'm free on Saturday,i(go)...to the mountains 7.The kitchen will look better if we(have)...red curtains 8.she(be)...angry if she(hear)...this tomorrow V.put the verbs in brackets into the correct form(conditional sentence type 2) 1.if i spoke English,my job (be)...a lot easier 2.if i(have)...enough money,i would buy a house 3.if the sun(stop)...shining,there(be)...no light on earth 4.if i(win)...a big prize in a lottery,i'd give up my job 5.if i had enough time now,i(write)...to my parents 6.it's too bad Helen isn't here.if she(be)....here,she(know)....what to do 7.if we(live)...in a town,life woul be better 8.i know i (feel)...better if i(stop)...smoke 9.if i(be)...you,i(help)...him 10.if i(be)...a millionaire,i(live)...on Mars mình đang cần gấp,giúp mình vs

tim x y z x/3 =y/4 , y/5 = z/7 va 2x+ 3y - z=186 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ giupp mk voiii mngg

Đơn giản các biểu thức sau khi bỏ dấu ngoặc: a) (a+b-c)-(b-c+d) b) -(a-b+c)+(a-b+d) c)(a+b)-(-a+b-c) d)-(a+b)+(a+b+c)

1. Fossil fuels reserves are limited, so we are trying to find ___________ sources of energy which are unlimited. 2. A tall, thin structure with parts that turn round, used to change the power of the wind into electricity is called __________. 3. All fossil fuels are ____________ resources that cannot be replaced after use. 4. Wind power is the fastest growing ____________ of energy in the world. 5. Another renewable source of energy is ____________ heat which comes from deep inside the earth. 6. People use ____________ to run machines, heat and cool their homes. 7. Fuel supplies are nearly____________, so we need to look for alternative sources of energy to replace them. 8. 10 000 birds were _________ at the ceremony yesterday. They flew into the sky and dissappeared. 9. A lot of ____________ dams have been built to use the power of water and produce electricity. 10. These days jobs have been ____________, but it’s difficult for someone to look for a good one. 11. We should make __________ of sources of energy suitably. 12. We have only 45 minutes for this lesson. We have ____________ time for it. 13. The country has the large ___________ of coal which are available to be used in the future or when it is needed. 14. ________ power can be very dangerous although it can provide enough electricity for the world’s needs. 15. His love for Jane is unconditional and __________. He says it will never end.

cho v lít khí A gồm H2,CO,O2 trong bình kín bật tia lửa đốt cháy các khí trong bình đưa về điều iệ ban đầu khi V khí còn 56,25% V khí ban đầu dẫn toàn bộ sản phẩm qua dung dịch nước vôi dư thu đc 20 gam kết tủa khí còn lại 15,6 lít o2 . tính V và % các khí trong hỗn hợp ban đàu

1x2x3x4x...x499x500 có tận cùng mấy chữ số 0 mik sẽ vote 5 sao và cảm ơn

Thực hiên phép tính sau một cách hợp lí: 12.3......2013 - 1.2.3 .... 2012 - 1.2.3....2012^2 Trả lời đầy đủ cho mk

Phác họa lại cô bn này giúp mik ( đẹp đẹp chút nha nhớ ko spam)

11. Viết liên tiếp 15 số lẻ đầu tiên để được một số tự nhiên. Hãy xoá đi 15 chữ số của số tự nhiên vừa nhận được mà vẫn giữ nguyên thứ tự các chữ số còn lại để được: a) Số lớn nhất. b) Số nhỏ nhất.