The key of the reduction of salt intake is__________．
A. salt is all inerrant flavor enhancer and preservative
B. salt is an essential nutrient for the body
C. the businessmen worry they will get less profit
D. there are some other important factors for high blood pressure
查看答案
国家规定的核医学科唯一强制检定的核医学仪器为()
A. SPECT
B. γ照相机
C. 肾图仪
D. 活度计
McGrady plays basketball so well__________. 查看材料
A. that his teammates cannot help admiring him
B. that he is often yelled at by the coach
C. who can play basketball so well
D. because he had been injured
E. if Houston hopes to win
F. since he returned
单位体积溶液内所含的放射性活度为()
A. 放射性浓度
B. 比活度
C. 活度
D. 吸收剂量
微信支付 
支付宝支付