由10的四个约数组成的比例是[ ]
B．10：2=5：1
C．2：5=1：10
答案：B
_______the sharks exciting?[ ]
A. Did
B. Does
C. Was
D. Were
认为“暑必兼湿”的医家是（）.
A.叶天士
B.吴鞠通
C.王孟英
D.薛生白
