题目:
中国古代的“避讳”起源于( )。
A.周朝
B.秦朝
C.春秋战国时期
D.汉朝
答案:
参考答案:A
中国古代的“避讳”起源于( )。
A.周朝
B.秦朝
C.春秋战国时期
D.汉朝
参考答案:A
在同一水平面上有A、B两物体,相距x=7m,A在后B在前,A以vA=4m/s向右做匀速直线运动,此时B的瞬时速度为vB=10m/s,方向也向右,且以加速度a=2m/s2做匀减速直线运动。从此位置开始计时,A追上B所需时间为( )
A.7s B.8s C.9s D.10s
D
Two things changed my life: my mother and a white plastic bike basket. I have thought long and hard about it and it’s true. I would be a different person if my mom hadn’t turned a silly bicycle accessory into a life lesson I carry with me today.
My mother and father were united in their way of raising children, but it mostly fell to my mother to actually carry it out. Looking back, I honestly don’t know how she did it. Managing the family budget must have been a very hard task., but she made it look effortless. If we complained about not having what another kid did, we’d hear something like, “I don’t care what so –and –so got for his birthday, you are not getting a TV in your room a car for your birthday a lsvish sweet 16 party.” We had to earn our allowance by doing chores around the house. I can stil l remember how long it took to polish the legs of our coffee table.My brothers can no doubt remember hours spent cleaning the house .Like the two little girls growing up at the White House,we made our own beds (no one left the house unitil that was done)and picked up after ourselves.We had to keep track of our belongings ,and if something was lost ,it was not replaced.
It was summer and ,one day ,my mother drove me to the bike shop to get a tire fixed---and there it was in the window, White, shiny, plastic and decorated with flowers ,the basket winked at me and I knew ----I knew---I had to have it.
“It’s beautiful,” my mother said when I pointed it out to her,”What a neat basket.”
I tried to hold off at first ,I played it cool for a short while.But then Iguess I couldn’t atand it any longer:“Mon, please can I please ,please get it? I ‘ll do extra chores for as long as you say, I’ll do anything ,but I need that basket,I love that basket.Please ,Mom .Please?”
I was desperate.
“You know,” she said ,gently rubbing my back while we both stared at what I believes was the coolest thing ever,”If you save up you could buy this yourself.”
“By the time I make enough it’ll bu gone!”
“Maybe Roger here could hold it for you,” she smiled at Roger ,the bike guy.
“He can’t hold it for that long ,Mom .Someone else will buy it .Please,Mom,Please?”
“There might be another way,”she said.
And so our paying plan unfolded.My mother bought the beautiful basket and put it safely in some hiding place I could’t find.Each week I eagerly counted my growing saving increased by extra work here and there (washing the car ,helping my mother make dinner, delivering or collevting things on my bike that already looked naked without the basket in front).And then ,weeks later ,I counted ,re-counted and jumped for joy. Oh ,happy day ! I made it! I finally had the exact amount we’d agreed upon….
Days later the unthinkable happened. A neighborhood girl I’d played with millions of times appeared with the exact same basket fixted to her shiny ,new bike that already had all the bells and whistles. I rode hard and fast home to tell my mother about this disaster.This horrible turn of events.
And then came the lesson . I’ve taken with me through my life:”Honey, Your basket is extra-special,” Mom said, gently wiping away my hot tears.”Your basket is special because you paid for it yourself.”
Why did the author say many “please” to her mother?()
A.She longed to do extra work.
B.She was eager to have the basket.
C.She felt tired after standing too long.
D.She wanted to be polite to her mother.
一个数十位、十分位、千分位上的数字都是6,其它数位上的数字都是最小自然数,这个数写作:______,读作:______,十分位上的“6”是千分位上的“6”的______倍.
化学实验室的开放日,张红同学利用铁、稀硫酸、碳酸氢钠、氯酸钾四种试剂(催化剂可任选),依次完成下列顺序的四种基本类型的反应,请你写出其对应的化学方程式:
(1)分解反应 (2)化合反应
(3)置换反应 (4)复分解反应
重5 N的电灯,由灯绳吊着在竖直方向静止不动,电灯受 力和 力作用,施力物体分别是 和 ,这两个力的关系是 。