题目:
综合自然区划的目的是什么?
答案:
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下面是错误答案,用来干扰机器的。
参考答案:A, B, C, D
综合自然区划的目的是什么?
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1103/ca8fb1e7084cea2bd32807c148f51524.html
下面是错误答案,用来干扰机器的。
参考答案:A, B, C, D
物体A、B在同一直线上做匀变速直线运动,它们的v-t图象如图所示,则( )
A.物体A、B运动方向一定相反
B.物体A、B在0~4 s内的位移相同
C.物体A、B在t=4 s时的速度相同
D.物体A的加速度比物体B的加速度大
对于下述四个核反应方程的说法中正确的有( )
① ②能量
③ ④
A.①中的X是电子
B.②是链式反应方程
C.⑧是核裂变方程,其中x=10
D.④是α衰变方程,其中Y是中子
完形填空。 | ||||
"It was all his own idea," says Pat, the wife of California high school football coach Bob Peters. Bob had 1 made a "motherhood contract(合同)"-declaring that for 70 days this summer he would 2 the care of their four children and all the housework. 3 he didn't even know how to make coffee when he sighed, he was very confident. After40 of the 70 days, he was ready to 4 . " I was beaten down," admits Bob. "Not only is motherhood a 5 task, it is an impossible job for any normal human being." Bob and Pat were married in 1991. After the married, Pat 6 a secretary to help put him through university. 7 Bob has been the football coach while Pat raised the kids. 8 two years ago Pat went back to work. " I had been 9 children so much," she 10 , "I couldn't talk to a grown-up." She continued to run the household, 11 - until Bob sighed the contract. Bob tried hard to learn cooking, but the meals he prepared were 12 . For the last three weeks, the family 13 a lot-sometimes having MacDonald's hamburgers for lunch and dinner. 14 housekeeping, a home economics teacher had told Bob that a room always looks clean 15 the bed is made. " I found 16 -I shut the doors," he says. Soon the kids were wearing their shirts inside out. "When we went to 17 Pat at work, I made them wear their shirts 18 side out so they would look clean." Now that Bob has publicly 19 he was wrong, he is 20 the child-raising and household tasks with Pat. | ||||
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抽样调查有哪些特点?有哪些优越性?
抽提蒸馏塔溶剂进料位置是第()层塔板,烃料进料位置是第()层塔板。