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【简答题】
Stunt Car Driving A thief runs from the bank. He jumps into a waiting car and roars off. People run after him, but it's too late. He's gotten away. Or has he? Look! Another car is coming toward the thief. The car is not stopping. Crash!!! Suddenly the two cars are in flames. There's been a terrible accident. Scenes like this in movies thrill people all the time. The accident looks real, but no one is really hurt. These scenes are done by actors called stunt people. They take the place of the regular actors in the dangerous parts. A director hires stunt people to appear in a film. First the stunt people plan what will happen. This is called rigging the gag. They go over each part of the scene many times. The timing is very important. It may take many days to plan a stunt. The stunt people then check all the equipment. Everything must be in perfect working order. Then it's time to begin. For a crash scene, the stunt people get into the cars. The cameras roll. At the moment of the crash, the two drivers jump from the cars. The stunt drivers are quick, and their escape does not show on the film. The shells of two other cars are then towed to the scene. These shells look just like the cars that crashed. Dummy drivers arc put into the cars. When the cars hit a trigger in the road, they burst into flames. These shells have no engines and they burn without exploding. The camera takes pictures of it all. l. Put these events in the order that they happened. What happened first? Write the number 1 on the line by that sentence. Then write the number 2 by the sentence that tells what happened next.
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【单选题】关于随机抽样,下列哪一项说法是正确的
A.
抽样时应使得总体中的每一个个体都有同等的机会被抽取
B.
研究者在抽样时应精心挑选个体,以使样本更能代表总体
C.
随机抽样即随意抽取个体
D.
为确保样本具有更好的代表性,样本量应越大越好
E.
选择符合研究者意愿的样本
【单选题】关于随机抽样,下列哪一项说法是正确的
A.
抽样时应使总体中的每个研究对象都有同等的机会被抽取
B.
研究者在抽样时应精心挑选研究对象,以使样本更能代表总体
C.
随机抽样即随意抽取研究对象
D.
为确保样本具有更好的代表性,样本量应越小越好
【单选题】关于随机抽样,下列哪一项说法是正确的
A.
抽样时应使得总体中的每一个个体都有同等的机会被抽取
B.
研究者在抽样时应精心挑选个体,以使样本更能代表总体
C.
随机抽样即随意抽取个体
D.
为确保样本具有很好的代表性,样本量应越大越好
E.
选择符合研究者意愿的样本
【判断题】灰度模式是一种标准的颜色模式,是 16位深度的图像模式,也就是2^8,2^8=256,在全黑和全白之间插有254个灰度等级的颜色来描绘灰度模式的图像。
A.
正确
B.
错误
【单选题】属于非离子型表面活性剂的是 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
肥皂类 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
B.
高级脂肪醇硫酸酯类 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
C.
脂肪族磺酸化物 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
D.
聚山梨酯类 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
E.
卵磷脂 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】气血两虚的病变多见于哪两脏
A.
心与脾
B.
心与肺
C.
心与肾
D.
脾与肝
【单选题】已知【图片】为来自正态总体【图片】的简单随机样本,如果在显著性水平0.01下无法拒绝【图片】,【图片】已知,那么在显著性水平0.005下,下列结论中正确的是
A.
无法拒绝
B.
可能接受,也可能拒绝
C.
一定拒绝
D.
不接受,也不拒绝
【单选题】关于随机抽样,下列哪一项说法是正确的
A.
研究者在抽样时应精心挑选个体,以使样本更能代表总体
B.
抽样时应使得总体中的每一个个体都有同等的机会被抽取
C.
随机抽样即随意抽取个体
D.
为确保样本具有更好的代表性,样本量应越大越好
【判断题】已知【图片】为来自正态总体【图片】的简单随机样本,均值【图片】未知,利用枢轴量法求【图片】的置信度为【图片】的置信区间时使用的枢轴量就是检验【图片】问题中的检验统计量。
A.
正确
B.
错误
【单选题】关于随机抽样,下列哪一项说法是正确的
A.
选择符合研究者意愿的研究对象
B.
研究者在抽样时应当精心挑选个体
C.
抽样时应确保每个个体都有同等机会被抽中
D.
进行抽样时,样本量应该越大越好
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