100-77= 400+70= 500+600= 1300-700= 300+60=
600-400= 68+42= 4500-500= 7300-7000= 90+30=
64÷8+6= 56-7= 900+3000= 9000+1000= 9×7-13=
,
,
的三角形为直角三角形;射击集训队在一个月的集训中,对甲、乙两名运动员进行了10次测试,成绩如下:
甲:9,6,6,8,7,6,6,8,8,6;
乙:4,5,7,6,8,7,8,8,8,9.
如果你是教练员,会选择哪位运动员参加比赛?请说明理由.

滑下滑梯
B .
弯折铁丝
C .
做功冲程
D .
压缩点火
yù:犹 荣 呼 领
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jiān yìng |
pí juàn |
xuān nào |
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如图所示,有三个电阻,已知Rl:R2:R3=1:3:6,则电路工作时,电压Ul:U2为:( )
,
,且
,则a+b的值是.
孔雀河谷地带景色优美, , , 。来自孟加拉湾的海洋季风越过喜马拉雅山吹到这里, , , , , 使人仿佛到了一个世外桃源,就像传说中的香格里拉。
①起伏有序,沟壑纵横 ②四周雪峰峻峭 ③赶着牛羊的牧童和转经的老人 ④雪峰下是风化的砾石和黄沙形成的堆积层 ⑤大片的绿洲似翡翠般镶嵌在孔雀河谷 ⑥错落有致的村庄,缭绕的炊烟 ⑦形成了青藏高原难得一见的湿润气候
B .
C .
D .
It by you now.
B .
C .
D .
=÷160=%=(这里填小数)。
I'm Lingling. I have got a new bike. It's a nice bike. I go to school by bike every day. My mother is a teacher. Her school is near our home. So she walks to work. My father is a doctor. He goes to work by car.