汽艇每分钟行驶660米,它的速度是帆船的3倍.求帆船的速度(用方程解)
设帆船的速度是x米/分,根据题意可得方程:
3x=660,
x=220,
答:帆船的速度是220米/分.
As we are ______ the market for Table Cloth, we should be glad if you would send us your best quotation.
A.in B.onC.entering D.at
下列哪些可防止注射剂中药物氧化()
A.枸橼酸
B.硫脲
C.依地酸钠钙
D.苯酚
E.液体药物基质吸收容纳