药典规定肉桂含挥发油总量不得少
A.1.2%(ml/g) B.2.2%(ml/g) C.3.2%(ml/g)D.4.2%(ml/g) E.5.2%(ml/g)
参考答案:A
已知四条直线y=kx-3,y=-1,y=3和x=1所围成的四边形的面积是12,则k的值为 [ ]
A.1或-2
B.2或-1
C.3
D.4
She _ royal stories for the BBC when she was a reporter. [ ]
A. reported to
B. reported on
C. reporting on
D. was reported