Some people think that CD-ROMs will soon

All substances, ＿＿＿＿＿ solids, liquids, or gases, are made up of entirely atoms.

A．whether they

B．whether

C．whether are they

D．whether are

可作为胆囊小结石与息肉鉴别的最佳体位是

A.仰卧位 

B.俯卧位 

C.坐位或立位 

D.右侧卧位 

E.头低脚高位

氢气是无色、无味、无嗅、无毒不可燃性气体。

某患者因产后大出血而导致闭经，伴头晕心悸，纳差神疲，面色萎黄，神情淡漠， * * 干涩，性欲减退，舌淡苔少，脉虚数。治疗在补气养血的基础上，应加用

A．附子、肉桂温肾阳之品

B．鹿角霜、紫河车血肉之品

C．生地、女贞子滋阴之品

D．龙眼肉、阿胶养血之品

E．当归、丹参通经之品