短周期元素a，b，c在周期表中的位置关系如图所示，则 a，b，c3种元素的名称是
A．氢、氟、硫
B．氟、硫、砷
C．氦、氟、硫
D．氖、氯、硒
答案：C
—Recently there _______ some news about the suicides (自杀) of Korean artists.
—Yes. Korean artists face too _______ pressure. [ ]
A. was; much
B. were; many
C. were; much
D. was; many
髁突高位切除术，可用于下列哪一类型颞下颌关节紊乱病的治疗
A．可复性关节盘前移位B．不可复性关节盘前移位C．髁突骨折D．骨关节病E．关节盘穿孔
