Have you ever dreamed of playing in front of thousands of people at a concert,       _______everyone is clapping and appreciating your music?

A．in which

B．for which

C．from which

D．at which

关于消除速率常数叙述正确的是

A．是药物进入体循环的量与所给剂量的比值

B．可用来衡量药物消除速度的快慢

C．是药物在体内代谢、排泄的速度与体内药量之间的比例常数

D．与生物半衰期(t1/2)的关系为等于0．693/t1/2

E．此值越小表明表观分布容积越小