方程2x+8=0的解是x=______.
2x+8=0
移项得:2x=-8
系数化1得:x=-4.
故填-4.
-How much did this CD __________ you, Sally?
-I got it for 5 dollars.[ ]
A. use
B. spend
C. take
D. cost
可扩张血管,增加和调节血液循环,与麻黄配伍用,增强发汗作用的药物是()
A.柴胡
B.桂枝
C.葛根
D.紫苏
E.细辛