thành phần ko khí luôn bị tác động bởi các yếu tố khác nhau: a,khi thải từ các nhà máy b,cây xanh quang hợp

cho hàm số y=x . a) vẽ đồ thị (d) của hàm số . b) gọi M là điểm có tọa độ là (3;3) .điểm M có thuộc (d) không ? vì sao ? c) qua M kẻ đường thẳng vuông góc với (d) cắt Ox tại A và Oy tại B.tam giác OAB là tam giác gì ? tại sao ?

A. Read the following text and choose the option A, B, C or D to complete the following statements. NO GIRLS ALLOWED Only men could take part in the ancient Olympic Games. Married women were not even allowed to watch the events. Although women were not allowed into the Olympic Games, they still did sports. Young girls had their own Games called the Heraia, in honor of the goddess Hera, the wife of Zeus. The Heraia was held every four years and had running races only. There were 3 separate races for girls, teenagers, and young women. Women were not allowed to complete in the Olympics until the 1900 games in Paris. There were 19 women out of a total of 1,225 athletes. The women did tennis, gold, and croquet. Women competed in swimming events for the first time in 1912. But none of them were from America, which did not allow female athletes to compete in events without wearing long skirts! 1. __________ could take part in the ancient Olympic Games. A. men B. women C. men and women B. everyone 2. Married women ____________________________________. A. were allowed to watch the events. B. were banned to watch the events. C. were allowed to take part in the events. D. A and C are correct. 3. Young girl’s Games was called _______________ A. The Olympics B. Zeus C. Hera D. Heraia 4. Hera is ________________ A. The first female athlete B. the wife of Zeus C. a goddess D. B and C correct 5. ___________ were the only event in the Heraia A. running races B. tennis tournaments C. golf tournaments D. swimming events 6. America allowed female athletes to compete in events if _________ A. they wore long skirts. B. they didn’t wear long skirts C. they wore short skirts D. they wore black trousers B. read the text again and answer these following questions. 1. How often was the Heraia held? _______________________________________________________________ 2. Who could take part in running races in the Heraia? _______________________________________________________________ 3. Where could women compete in the Olympics? _______________________________________________________________ 4. How many women were there in the 1900 games? _______________________________________________________________ 5. Were women in swimming events in 1912 from America? _______________________________________________________________

Bài 1: Tìm x 1)2x+5=x-1 2)|x-2y|+|4y-5z|+|z-3x|=2011 3)11+(15-x)>1 4)-12+(x-9)<0 5)x-(13-x)=-24+(-7+x) 6)(x-7)+(5-x)=15-(-8+x) 7)5(x-6)-2(x+3)=12 8)3(x-4)-(8-x)=12 9)4(x-5)-3(x+7)=-19 10)7(x-3)-5(3-x)=11x-5 11) 7(x-9)-5(6-x)=-6+11x Bài 2 : Tìm x €Z biết 12) (x+3) chia hết cho x 13) (x+7) chia hết (x+5) 14 ) (x+6) chia hết ( x +2) Bài 3: Tìm giá trị lớn nhất , giá trị nhỏ nhất ( nếu có) của biểu thức sau : 15) A =|x-9|+2015 16) B =5-|x+4| Bài 4: Cho a €Z 1) (-7a) và (-9a) 2) 5(a-1) và 7(a-1)

Giả sử em là chủ cửa hiệu bán shop bán hoa và đồ lưu niệm, trong kế hoạch bán hàng, khi nào em cần cộng hoặc khi nào phải trừ thêm “ Yếu tố tăng ( giảm)”; trong kế hoạch mua hàng, khi nào cộng hoặc trừ “ Nhu cầu dự trữ hàng hóa”.

Giải hộ mình nha mình đang cần gấp ngày mai đi học rồi nên giải nhanh hộ mình nha mình cảm ơn

II. Give the correct form of the word in brackets to complete the following sentences. 1. I love playing football. I want to become a _________ in the future. (FOOTBALL) 2. I am _____________ in practice yoga every day to help me relax. (INTEREST) 3. Many people do exercise regularly to keep fit and _____. (HEALTH) 4. Peter can play a lot of sports such as football, volleyball, basketball and tennis, etc. He looks quite _____. (SPORT) 5. I won the car in a _____. (COMPETE) 6. This helps explain the ____ of underwater photography. (POPULAR)

tính khối lượng mol trung bình của hỗn hợp khí có thành phần phần trăm về thể tích :79%N;20%O2;1%CO2;1%hơi nước

Mọi người giúp mình bài 9 với bài 10 nhé hình bên kia là của bài 9 nhé . Cảm ơn mọi người

Cho 0,1 mol lysin tác dụng với 200ml dung dịch NaOH 1M thu được dung dịch X. Dung dịch X tác dụng vừa đủ với V ml dung dịch HCl 1M. Giá trị của V là