若二面角α-l-β的大小为5π6，直线m⊥α，直线n⊂β，则直线m与n所成的角取

夜间驾驶机动车在照明条件良好的路段跟车行驶怎样使用灯光？

A、关闭前照灯
B、使用远光灯
C、关闭所有车灯
D、使用近光灯

脾肾阳虚型肥胖的代表方是：

A．右归丸 

B．真武汤 

C．苓桂术甘汤 

D．济生肾气丸 

E．归脾汤

My mother is a diligent and kind woman. She is very busy from morning till night. As a teacher, she works hard.   小题1:    Both my brother and I love her dearly as she loves us.

My mother has been teaching math at a middle school in my hometown. She goes to work early in the morning and does not return home until late in the afternoon.    小题2:  She treats them with patience and teaches them well. For her excellent quality and very good teaching results, she has been elected as a model teacher several times.

  小题3:    Every day, when she comes back home from work, she sets about doing housework, sweeping the living room and bedrooms or cleaning the furniture, and putting everything in good order. She seems to be busy all the time. As she has been very busy working every day, she looks older than her age. But she looks as cheerful and happy as ever. Mother never buys expensive dresses for herself, but she often buys some inexpensive but high quality clothes for us.  小题4:    She just eats a plain meal outside when she is too busy to cook herself. She lives a busy yet simple life, without any complaints.

Often she says to us, “work while you work, and play while you play. That is the way to be happy and gay. If you do not work, you will become lazy and be of no use to society”. What a piece of good advice this is!   小题5: This advice of hers will always serve as a guide to my behavior. My mother is great indeed, and I always feel proud of her.

A．She enjoys listening to classic music.

B．As a mother, she takes good care of us and gives us every comfort.

C．She loves her students and cares for them.

D．She never goes to expensive restaurants to enjoy meals.E. My mother is hard-working and never wastes money.

F. I never forget it and always bear it in my mind.

IP multicasting is a set of technologies that enable efficient delivery of data to manylocations on a network．Rather than making multiple copies of a message intended to bedistributed to multiple recipients at the (71) of origin of a message，multicasting initiallysends just one (72) and does not copy it to the individual recipients until it reaches theclosest common point on the network，thereby (73) the bandwidth consumed．Networkperformance is significantly (74) because it isn’t bogged down with the processing andtransmission of several large data files；each receiving computer doesn’t have to (75) thetransmitting server for the file．

A．extending
B．minimizing
C．demolishing
D．reducing

农合机构开办的票据业务不包括（）。

A.支票

B.银行汇票

C.商业汇票

D.银行本票