砂炒鸡内金宜选择的火力是()
A.文火
B.中火
C.武火
D.先文火后武火
E.先武火后文火
参考答案:B
哪些金属可以用作加氢催化剂的活性金属组分?
Triangle QRS is inscribed in a circle. Is QRS a right triangle (1) QR is a diameter of the circle. (2) Length QS equals 3 and length QR equals 5.