某药半衰期为24小时，若24小时给药一次，约需几次给药达稳态浓度 - 查题网

>> 成人高等教育 / 药理学

成人高等教育 / 药理学

正确率：100%

某药半衰期为24小时，若24小时给药一次，约需几次给药达稳态浓度

A、
2次
B、
3次
C、
5次
D、
7次

积分

药理学

参考答案：

点击查看答案

佳题速递：

市场占有率高，业务增长率低，利润率高所选对策如增加市场份额的经营单位是（）管理学

已知一元钱的边际效用为3个单位，一支钢笔的边际效用为36个单位，则消费者愿意用( )来买这支钢笔。西方经济学

平行于横梁截面的内力是剪力，作用面于梁横截面垂直的内力偶是弯矩。结构力学

阅读理解：阅读下列短文，回答文后问题，选择最佳答案Trees mainly serve man in three important ways: They provide him with wood and other products; they provide him shade; and they help to prevent droughts and floods.Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important．In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear.This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil allowing the rain to sink in and also bind(固定) the soil, thus preventing it from being washed away easily；but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When the top-soil is gone, nothing remains but worthless desert.Two thousand years ago，a rich and powerful country cut down its trees to build warships, with which to gain itself an empire．It set up the empire, but, without its trees, its soil became poor and grew weak. When the empire fell to pieces, the home country found itself faced by floods and starvation(饥荒)．3. Land becomes desert after all trees are cut down because _ _ _ _ _ _ _ _ _ _ . A、 A. roots of trees break up the soil B、 B. no tree keeps the rain and protects the top-soil C、 C. strong winds bring a lot of sand D、 D. there are too many rainfalls to make it 大学英语1

按FCA、CPT和CIP三种贸易术语成交，就卖方承担的风险而言，FCA最小，CIP最大。国际贸易实务

抗日战争期间，新加坡成立了由？为主席的华侨筹赈祖国难民总会。中国近现代史纲要