表示4个氢原子的符号是[ ]
A.4H2
B.4H
C.2H2
D.H4
答案：B
Do you have ___ basketball? Let's play ____ basketball after school.[ ]
A. an; a
B. a; a
C. /; /
D. a; /
冠心痛患者，怀疑甲亢，检查时不宜选用
A．甲状腺摄131I率
B．T3抑制试验
C．TRH兴奋试验
D．甲状腺激素结合试验
E．125I-T3吸收试验
