若和是方程的两组解，则_____，_____．
There is a big old tree our school．（在……对面）
Dragon Boat Festival is a （传统的） festival in China．
How much are these （短袜）？
Earthquakes always happen s ， so it's difficult to warn people about them．
We should a making any noise in the reading room．
和
是方程
的两组解，则
_____，
_____．
粤公网安备 44130202000953号