多项式4x2y3z-12x3y4中各项的公因式是______.
系数的最大公约数是4,各项相同字母的最低指数次幂是x2y3,
所以公因式是4x2y3,
故答案为:4x2y3.
—___do you celebrate Chinese New Year?
—We celebrate it by giving presents and red packets.[ ]
A. Where
B. What
C. How
D. Why
据《素问·咳论》内容,症见“咳而失气”者,病属()
A.三焦咳
B.小肠咳
C.大肠咳
D.胃咳
E.肺咳