继电器中的NC指的是（）。A、公共端 B、线圈端 C、常闭端 D、常开端

（1）-xy²（x+y）³+x（x+y）²的公因式是______；

（2）4x（m-n）+8y（n-m）²的公因式是______．

A woman saw three old men sitting outside .She said, "I don’t’ think I know you ,but you must be very hungry .Please come in and have something to (1) ______."

"We don’t go into a house (2) ______. " they answered ."Why is that ?" she asked .

One of the old men said ,"His name is Wealth（财富）,this is Success, and I am Love ,Now go in and (3) ______with your family which one of us you want in your house ."

The woman went in and told her family all that happened .She said, "Let’s invite Wealth .We have been so (4) ______ ." Her husband disagreed." My dear ,why don’t we invite Success ? Don’t you want me to be a successful man ?" Then her daughter asked ."Would it be (5) ______ to invite Love ? Our life will then be filled with love!" In the end ,the family decided to take the (6) ______ advice.

So the woman went out and asked ,"Which one of you is (7) ______? Please come in and be our guest." Love got up and started walking to the house. The other two also got up and (8) ______ him. Surprised ,the lady asked Wealth and Success, "I ( 9) ______invite love .Why are you coming along ?" The two old men answered . "If you invited Wealth or Success, the other two would have to (10) ______ , but as you invite Love ,wherever he goes ,we go with him. Where there is Love ,there is Wealth and Success."

小题1:A. say  B. eat  C. use

小题2:A. together   B. alone  C. crowdedly

小题3:A. play  B. exercise  C. discuss

小题4:A. poor  B. rich  C. lucky

小题5:A. worse  B. better  C. less

小题6:A. father’s  B .mother’s  C. daughter’s

小题7:A. Love  B. Wealth  C. Success

小题8:A. left  B. followed  C. stopped

小题9:A. only  B. hardly  C. never

小题10:A. join in  B. go along with  C. stay out

2011年哈三中派出5名教师去大兴安岭地区的三所中学进行教学交流，每所中学至少派一名教师，则不同的分配方法有（　　）种．

A．80

B．90

C．120

D．150

人们在一些几乎从不使用的小器具、小玩意上浪费的金钱数额令人吃惊。例如，我兄弟两年前用100元买了一个电子冰淇淋制作机，时至今日他只用过三次。而他坚持说，不管他使用这个冰淇淋机的次数多少，这次投资是划算的，因为( )

A．将来冰淇淋价钱会上涨

B．他买这个冰淇淋机是为了获得需要时即能使用的便利

C．由于使用频率这么低，他节约了大量电能

D．由于通货膨胀，今天的100元已不像两年前值那么多了

矩形花键联按的主要几何参数有（）。

A.大径D、小径d

B.小径d、键数N

C.大径D、小径d、键数N

D.大径D、小径d、键数N、键宽B