1/hòa tan hoàn toàn 0,8gam một oxit kim loại hóa trị 2 vaò dd hcl,sau phản ứng thu được 1,9 gam muối khan .xác định công thức hóa học của oxit kim loại và gọi tên
1. Using computers too much may have harmful effects ............. yours minds and bodies
A. on B. to C. with D. onto
Form : effect on (n): ảnh hưởng đến
2. I love the people in my village. They are so ...
A national park is a large piece of land in (56)________animals are free to come and go. Trees and (57)________grow everywhere. People go to a national park to (58)________nature. Many people stay in campgrounds in natural parks. They sleep in tents and cook (59)________food over campfires. They...
11. They share a lot of hobbies and interests.
They have a lot of hobbies and interests in common. (
12. This train should have left 30 minutes ago.
This train was meant to be off 30 minutes ago.
13. Alcohol is bad for your health, and so are cigarettes.
Neither alcohol nor cigarettes is good...