^{\(\dfrac{4a-9a^{-1}}{2a^{\dfrac{1}{2}}-3a^{\dfrac{1}{2}}}\)}

tìm giao điểm đồ thị hàm số y= x²-2x+3 và y= x²-x+2 

cho 100ml dung dịch glucozo chưa rõ nồng độ, tác dụng với agno3 dư trong đ nh3. đun nóng thu được 0,54 gam ag. nồng độ mol/l của glucozơ dd là :

There are five members in Mai’s family. They are ___________ (1)  of one another. Although her parents are busy at work, they try to spend as much time ___________ (2)   with their children as possible. Members of her family share the household chores to reduce the burden for her mum. For example, Mai is ___________ (3)   a lot of study pressure, but she must ___________ (4)  the responsibility for  washing the dishes, taking out the garbage and looking after her brothers after school. They live happily together because they feel safe and ___________ (5)  in a close-knit family.

1. A. support                           B. supportive                           C. supported               D. supporting

2. A. stay                                 B. staying                                C. to stay                     D. stayed

3. A. through                           B. over                                    C. below                      D. under

4. A. take                                B. make                                   C. do                           D. give

5. A. funny                              B. secure                                 C. depressed               D. contented

Ở nhiệt độ thường, chất nào sau đây tồn tại ở trạng thái rắn ?