在放射免疫分析药盒中,最常用于标记抗原的放射性核素是()
A.131I
B.125I
C.99mTc
D.113In
E.111In
参考答案:B
The functioning of the radiotelegraph installations for motor lifeboats and/or the portable radio apparatus for survival craft,if provided,()with the provisions of the regulations.
A.provided
B.supplied
C.complied
D.divided
RN-1催化剂的活性组分是()。