首关消除(首过作用)主要是指A．舌下含化的药物，自口腔黏膜吸收后，经肝脏代谢药物降低

缺词填空。

     I am a student at sunshine school and I am in Grade 8. My favourite s__1__ are PE and Science. I am very interested in p__2__ volleyball. Every Monday and Friday, I play volleyball w__3__ my classmates. I also like singing and dancing.

     I would like to become a b__4__ because I like birds and nature very much. I think it is i__5__ for me to do something to p__6__birds. I want to know m__7__ about birds, too. I can come to club activities

f__8__ 4 p.m. to 5 p.m. on Sundays.

      I will be very happy i__9__I can become a m__10  _ of your club.

该图是“沿37°N世界某地地形剖面及降水量分布图”，读图完成问题。

小题1:图中内华达山脉两侧海拔2 000 m处的降水量差值约是

A．250 mm

B．500 mm

C．750 mm

D．1 000 mm小题2:造成②地降水量较少的主要因素是

A．大气环流

B．太阳辐射

C．植被分布

D．地形起伏

如何帮助学生在道德认识的基础上形成道德信念

“三违”指的是违章指挥、违章作业和违反劳动纪律。

请简要写出决定客户服务质量的因素主要包括哪几个方面。