选择题：下列关于误差的说法中正确的是 ( ) A．测量时出现误差，则说明一定是出了差错

题目：

下列关于误差的说法中正确的是 ( )

A．测量时出现误差，则说明一定是出了差错

B．在测量时，多测量几次，取平均值可以减小误差

C．误差是难以避免的，所以减小误差是不可能的

D．改进实验方法和采用精密的测量工具可以消除误差

答案：

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答案：C题目分析：公民行使监督权，一方面，为了国家和人民的利益，要敢于同邪恶势力进行斗争，勇于使用宪法和法律规定的监督权。另一方面，必须采取合法的方式，坚持实事求是的原则，不能干扰公务活动。暴力 * * ...

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Dad taught me a lot about life,especially its hard times.I remembered one of his__1__one night when I was ready to quit (退出)a political campaign (运动) I was losing,and wrote about it in my diary. Tired,feeling the many months of__2__,I went up to my study to make some notes.I was looking for a pencil in the back of my desk drawer.When I__3__ up one of Dad's old business cards that he was so proud of:Andrea Cuomo,Italian American Groceries Fine Imported Products.Then I thought about how he__4__with difficult situations,A lot of pictures appeared into my__5__,but one scene came sharply into view.We had just__6__to Holliswood,New York,we had our own house for the first time；it had some land around it,even__7__.One,in particular,was a great blue spruce (云杉)that must have been 40 feet tall. Less than a week after we moved in,there was a terrible__8__.We came home from the store that night to find the spruce__9__almost totally from the ground and thrown onto the street.When my brother Frankie and I saw the spruce,our hearts___10__ .But not Dad's. The rain was__11__.Then he announced,"OK,we're going to push him up !""What are you talking about,Dad?The roots are out of the ground!""Shut up,we're going to push him up,he's going to__12__ again."We couldn't say__13__to him.So we followed him into the house and we got what rope there was and we__14__the rope around the top of the tree that__15__on the street,and he stood up by the house,with me__16__on the rope and Frankie in the street in the rain,helping to__17__up the great blue spruce.In no time at all.We had it standing up straight again!Dad drove stakes(桩)in the ground,tied rope from the__18__to the stakes,and said,"Don't worry,he's going to grow again..." I looked at the__19__and wanted to cry,I couldn't__20__to get back into the campaign.
( )1.A.classes ( )2.A.struggle ( )3.A.turned ( )4.A.kept ( )5.A.heart ( )6.A.came ( )7.A.yard ( )8.A.storm ( )9.A.pushed ( )10.A.fell ( )11.A.stopping ( )12.A.stand ( )13.A.no ( )14.A.made ( )15.A.put ( )16.A.pulling ( )17.A.take ( )18.A.leaves ( )19.A.picture ( )20.A.wait	B．lectures B．working B．took B．worked B．mind B．left B．field B．rain B．pulled B．rose B．falling B．plant B．yes B．gave B．left B．pushing B．put B．roots B．card B．stop	C．lessons C．battle C．came C．dealt C．head C．got C．flowers C．snow C．put C．sank C．coming C．die C．it C．tied C．placed C．holding C．pull C．trunk C．tree C．leave	D．talks D．defence D．picked D．helped D．book D．moved D．trees D．wind D．struck D．dropped D．going D．grow D．nothing D．kept D．lay D．fixing D．push D．branches D．rain D．stay