不同品种的水泥不得混合使用。
参考答案:对
RII中,In标记抗体成人常用注射剂量是()。
A.74~111MBq
B.111~185MBq
C.185~370MBq
D.370~555MBq
E.555~740MBq
The rest of the students _____ not allowed to leave the classroom at that time. [ ]
A. are
B. have
C. was
D. were