Có hai điểm sáng S đặt trước gương phẳng.
a) Hãy vẽ ảnh của mỗi điểm tạo bởi gương.
b) Vẽ hai chùm tia tới lớn nhất xuất phát từ S và chùm tia phản xạ tương ứng trên gương.
c) Để mắt trong vùng nào sẽ nhìn thấy đồng thời ảnh của cả hai điểm sáng trong gương ? Gạch chéo vùng đó.
Viet lai cau sao cho nghia ko doi
1.I don't have so many books as my sister does.
I have ...........................................................
2.My friend has more teddy bears than I do.
I don't ..........................................................
3.There isn't as much juice on the table as there is in the fridge.
There is ......................................................................................
4.She has less time to relax than her husband does.
Her husband has ....................................................
5.There are more girl in my class than there are in hers.
Her class ......................................................................
6.There isn't as much sugar in my coffee as there is in yours.
THere is ..................................................................................
7.There are fewer shops in a small city than there are in a big one.
There are ........................................................................................
8.There is less noise in the country than there is in the city.
There isn't ..............................................................................
1.Mr.Hoang walks to work for half an hour.
It takes .....................................
2.What is the price of this cap?
How much .................................
3.
You shouldn't eat too much meat .
->You'd .................................................................................
4, Lan is the youngest of the three sisters.
-> Lan has ........................................................................
5, Our house is older than any other house in the living centre.
-> Our house............................................................
6.
There are eight hundred stamps in Hoa’s collection.
Hoa’s collection.......................................................................
7. How heavy is the chicken ?
What ......................................................................................?
8.listening to music is more interesting than watching TV.
I prefer ............................................................
9.The film is very amusing.
What ...................................