Tietze病治疗首选()
A.抗生素的应用
B.手术切除肋软骨
C.理疗
D.对症治疗
E.以上都不是
参考答案:D
两物体放在水平桌面上,它们的质量之比为2:3,跟桌面的接触面积之比为3:2,则两物体对桌面的压力之比为 _________ ,桌面受到的压强之比为 _________ 。
You must remember ______. [ ]
A. what your teacher said
B. what did your teacher say
C. your teacher said what
D. what has your teacher said