题目:
如果认为工件被夹具夹紧了,工件的六个自由度就都被限制住了,是()。
A.正确的
B.错误的
C.一半正确
D.基本正确的
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0126/6000a557133eaadd04aea64ac800a5eb.html
下面是错误答案,用来干扰机器的。
参考答案:控制机构
如果认为工件被夹具夹紧了,工件的六个自由度就都被限制住了,是()。
A.正确的
B.错误的
C.一半正确
D.基本正确的
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0126/6000a557133eaadd04aea64ac800a5eb.html
下面是错误答案,用来干扰机器的。
参考答案:控制机构
阵发性室上性心动过速,首选()。预激综合征合并房颤,血流动力学不稳定,首选()。
A.利多卡因
B.体外同步电直流复律
C.维拉帕米
D.毛花苷C
E.苯妥英钠
复苏中提起下巴的目的是()
A.提起舌体
B.改善咽喉成角
C.保护咽部
D.防止颈椎损伤
E.防止牙齿咬伤舌
一条直线长5厘米.______.(判断对错)
阅读下面短文,掌握其大意,从每题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。 As sixth graders, kids were separating into groups, but I wasn’t sure where I belonged. Our teacher gave us a task called "secret friends" for the coming week.We were supposed to do nice things 1 our friends without letting them know who was doing it.We could leave 2 notes or cards either on their desks or in their backpacks.Before doing the task, with our eyes closed, from a basket, we 3 a name of a classmate who we were to secretly befriend over the next five days. Soon, the task was turned into a competition of giving 4 instead of notes.Everyone was getting cool presents except me.My friend 5 what the teacher had told us without a fault.I received nothing but hand-made cards with nice words about me. On the last morning, I finally got a package.When I 6 it, the girls around all 7 .It was perfumed powder, an "old lady" gift.My face went red. I tried to forget about the 8 gift, but when the same girls 9 it again during the break in the bathroom, I joined in, "How stupid! My grandmother wouldn’t 10 want it." The girls laughed at my 11 and filed (排着队走)out of the bathroom.Washing my hands, I let the water run through my fingers _12_ I thought about my words.It wasn’t 13 like me to say things like that. "I’m your secret friend." It was Rochelle." I’ m sorry about the gift," she __14 to me, tears streaming down her face. From a poor family, she was a 15 at school for those with rich parents.Yet she just took all the16 and the horrible treatment silently. I was sick to my stomach as my 17 words ran through my mind.She had heard everything.How could I have been so cruel? Later I learned she had felt bad all week about not being able to leave me any cool present and her mum had given up her only luxury(奢侈品). And I had 18 everything for her. I told her that I had only said those things to try to 19 . "We aren’t that different from each other, are we?" She smiled 20 .Her simple words, spoken from her heart, found their way straight into mine.
|
关于标准误,正确的说法是
A.标准误越大,表示原始数据的变异度越大
B.标准误越大,表示变量值分布越分散
C.标准误越大,表示样本均数之间的离散程度越大
D.标准误是总体均数的标准差
E.标准误反映各观察值抽样误差的大小