消防安全钩(D型钩)开口打开状态长轴方向破断强度:轻型安全钩不小于()kN。
A.9.8kN
B.10.15kN
C.15.67kN
D.31.74kN
参考答案:B
There ____ a pen, a ruler and two books on the desk. [ ]
A. is
B. are
C. aren't
D. am
153Sm-EDTMP治疗骨肿瘤,按体重计算常用的剂量范围为每kg体重()。
A.3.7~7.4MBq
B.7.4~11.1MBq
C.11.1~14.8MBq
D.18.5~37MBq
E.185~370MBq