直线y=2x+4和直线y=x+3的交点的坐标是______.
解方程组y=2x+4y=x+3得x=-1y=2,
所以交点坐标为(-1,2).
故答案为(-1,2)
同义句转换。
1. At Christmas, parents always buy their children presents.
At Christmas, parents always ______________________________.
2. Her father watches TV for two hour every day.
Her father ______________________________ every day.
3. Li Lei never goes to school on foot.
Li Lei never ______________________________.
4. How do you like that new shopkeeper?
______________________________ the new shopkeeper?
5. Listen! Someone is knocking at our neighbor's door.
Listen! ______________________________ our neighbors' door.
在贮藏过程中,既易出现风化,又易潮解的药物是()
A.芒硝
B.儿茶
C.阿胶
D.肉桂
E.生地黄