mấy bạn bt bài này ko bt thì giúp mk với

Từ sau chiến dịch Việt Bắc thu đông 1947, Pháp tăng cường thực hiện chính sách ko cần giải thích

Làm thông điệp nhé với các chữ cái

Cho ba điện tích như hình vẽ. Trong đó q1 = 4μC. Biết q1 cách q3 một khoảng 4cm. Thay đổi vị trí của q2 trên delta sao cho lực điện tổng hợp tác dụng lên điện tích q3 đạt giá trị cực tiểu thì khoảng cách giữa q3 và q2 lúc đó là 2cm. Giá trị của q2 bằng

:) mình cho 5 sao ai làm nhanh nhất

Mọi người làm giúp em câu đầu tiên với ạ em cần gấp

giúp mk vs mk cần gấp (vote 5 sao và tlhn)

Cho dạng đúng của từ 1 The Grand Canyon is one of the......wonders of the world (nature) 2 On the first day of Tet we dress.... and go to pagoda (beauty) 3

Bài 1 It is important to (1)______ well,especially when you are studying . If you are at primary (2) ______,you may not go home for lunch and have a cooked meal of meat or (3)_______and vegetables .A chicken and lettuce sandwich ,with some (4) _______ fruit would be a light but (5)______ lunch. Many people around the world eat plain , boiled (6)_______ two or three times a day. Pupils and students often do not eat (7)______ when they are revising for an exam - they eat chocolate and (8)_____ lots of black coffee ! And by the way ,doctors say everybody should start the day with healthy (9)______ .It is also good for you to drink a lot of (10) ______ through the day. 1 A launching B emitting C eat D peaking 2 A school B weapons C space ships D rockets 3 A to B to wards C with D fish 4 A as soon as B fresh C as well as D such as 5 A burnt B explored C went off D healthy 6 A rice B audience C observatories D watcher 7 A sent back B returned to C well D except for 8 A weightlessness B drink C wavelengths D length 9 A space B atmosphere C vacant D breakfast 10 A scientists B drivers C water D astronauts Bai 2 spend from exercise fit ride for tired energy in calorie We need calories or (1) _____ to do the things every day .For example, when we walk or (2) _______a bike to school, we spend a certain amount of (3)_______and even when we sleep, we also use them . But how many calories should we (4)_______a day to stay in shape ? it is difficult (5)______ us to calculate .If people want to keep (6)_______, they should remember that everyone should have between 1600 and 2500 calories a day . We get calories (7)______ the food we eat .If we get to much food and do not take part (8)______ any activities ,we can get fat quickly .So besides studying ,we should do some (9)______ ,play sports or do the housework ,such as cleaning the floor ,cooking etc ,if we do not eat enough ,we feel (10)_____and weak.

K2S, Na2SO3, BaCl2, KCl. Thuốc thử dùng để phân biệt các dung dịch này là A. DD NAOH B. DD H2SO4 C. DD NACL D. DD KNO3