原式=-1-1×8+8=-1.
On every piece of the paper _________ pictures of some fish.[ ]
A. there is
B. there are
C. has
D. have
甲亢131I治疗应考虑增加剂量的因素()
A.病程长
B.有效半衰期较长者
C.术后复发
D.前一次治疗后疗效明显,但未痊愈者
E.未进行任何治疗