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【单选题】
点(-4,2,-1)在第几卦限?A.
1
B.
3
C.
6
D.
7
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举一反三
【单选题】The Chinese are looking forward to the first _______to land on the moon after three Chinese astronauts’ successful trip to space.
A.
measure
B.
attempt
C.
purpose
D.
desire
【简答题】量化误差和时基误差属于 误差,而触发误差属于随机 误差
【单选题】下列关于随机误差的说法错误的是
A.
随机误差也叫偶然误差
B.
随机误差是有规律变化的
C.
随机误差受多种因素引起
D.
随机误差服从正态分布
E.
抽样误差属于随机误差
【单选题】Lunar sight-seeing trips and orbiting space hotels are within reach, moon walking astronaut Edwin'Buzz' Aldrin said last week, but some who favor space tourism worried about its 'giggle factor'. Astro...
A.
has been covered up by vast clouds of dust and gas
B.
still remains unknown to astronomers
C.
has proved to be a black hole
D.
actually provides power for the rotation of file great spiral of stars
【单选题】测量误差可分为系统误差和随机误差,下列属于随机误差的有:
A.
单摆测重力加速度实验中,由于摆球中心与其重心不重合造成的摆长测量误差;
B.
伏安法测电阻实验中,电流表、电压表内阻所引起的实验误差;
C.
电表的零点未校准而引起的测量误差;
D.
电源不稳、温度波动引起的误差。
【简答题】V . 词汇运用 (10 分 ) A. 根据句意及首字母提示补全单词。 56. Tina is a m__________ plane for her little brother. 57. We should often c__________ with our parents, so that we can better understand each other. 58. — ...
【简答题】《花非花》的作者是谁?
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