更多“小力今年15岁，是九年级的一名学生，他总觉得自己不是读书的料”相关的问题
情景再现过程中想象的特点有（）。
A.想象要有具体的视象B.想象要求创作主体置身其中C.想象要引发真实的感受D.想象可以随意进行
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根据《工伤保险条例》，生活不能自理的工伤职工在停工留薪期需要护理的，由（）负责。
A.工会
B.社会保险行政部门
C.个人
D.所在单位
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单层单跨厂房的跨度尺寸一般有（）等。
A.10、15、18、20、30M
B.12、15、18、24、30M
C.5、15、18、24、26M
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二次型XTAX正定的充要条件是（）
\tA．存在可逆矩阵P，使得P
-1AP=E
\tB．存在n阶矩阵D，使得A=D
TD
\tC．存在正交阵Q，使得
，其中λ
i＞0(i=1，2，…，n)
\tD．对任何X=[x
1，x
2，…x
n]
T，其中x
i≠0(i=1，2，…，n)均有X
TAX＞0
The gravitational pull of the earth and moon is important to us as we attempt to conquer more and mo... moon. B. A rocket sent from the moon to the earth. C. A rocket made of earth. D. A rocket with no purpose.
As a rocket leaves the earth, the pull of the earth on it becomes less and less as the rocket roars out into space. If you imagine a line between the earth and the moon, there’s a point somewhere along that line, nearer to the moon than to the earth, at which the gravitational pull of both the earth and the moon on an object is just about equal. An object placed on the moon side of that point would be drawn to the moon. An object placed on the earth side of that point would be drawn to the earth. Therefore, a rocket need be sent only to this "point of no return" in order to get it to the moon. The moon’s gravity will pull it the rest of the way.
The return trip of the rocket to the earth is, in some ways, less of a problem. The earth’s gravitational field reaches far closer to the moon than does the moon’s to earth. Thus, it will be necessary to fire an earthbound rocket only a few thousand miles away from the moon to reach a point where the rocket will drift to earth under the earth’s gravitational pull.
The problem of rocket travel is not so much concerned with getting the rocket into space as it is with guiding the rocket after it leaves the earth’s surface. Remember that the moon is constantly circling the earth. A rocket fired at the moon and continuing in the direction in which it was fired would miss the moon by a wide: margin and. perhaps continue to drift out into space until "captured" in another planet’s gravitational field. To reach the moon, a rocket must be tired toward the point where the moon will be when the rocket has traveled the: required distance. This requires precise calculations of the speed and direction of the rocket and of the speed and direction of the moon.
For a rocket to arrive at a point where the moon’s gravity will pull it the rest of the way, it must reach a speed called the velocity of escape. This speed is about 25, 000 m/les (about 40,200 kilometers) per hour. At a speed less than this, a rocket will merely circle the earth in an orbit and eventually fall back to the earth.
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设区的市公安局根据工作需要设置公安分局。市、县、自治县公安局根据工作需要设置公安派出所。
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借款人向贷款人提出借款申请，贷款人自收到贷款申请及符合要求的资料之日起，应在（）周内向借款人正式答复。
\tA．1
\tB．2
\tC．3
\tD．4
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关于母婴保健医学技术鉴定的规定，不正确的是（ ）。
A.对婚前医学检查有异议的，可以申请进行母婴保健医学技术鉴定 B.母婴保健医学技术鉴定委员会委员由卫生行政部门提名 C.母婴保健医学技术鉴定组织为母婴保健医学技术鉴定委员会 D.母婴保健医学技术鉴定委员会分为省、市、县三级 E.母婴保健医学技术鉴定委员会的成员必须具有主任医师的专业技术职务
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下列国家中，以成文法系为主的包括( )。
A．法国B．德国C．中国D．美国E．印度
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在实际的推销活动中，与顾客的切身利益直接相关的是（）。
A.渠道B.价格C.促销D.产品
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组织、细胞代谢障碍引起的可逆性病变称为（）
A.变性
B.坏死
C.梗死
D.坏疽
E.以上都不是
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影响影像清晰度的因素不包括（）
A.焦点尺寸
B.影像接收介质的清晰度
C.IP的尺寸
D.显示器的矩阵
E.人眼的OTF
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氧气顶吹转炉炼钢采用（）管氧枪向熔池供氧。
A . 直管
B . 文氏管
C . 收缩管
D . 拉瓦尔管
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凡必须得到上级机关批准和指示后才能办理的公务，行文时使用( )文种。
A．报告
B．请示
C．函
D．批复
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A . 只与材料的力学性质有关B . 只与构件的形状尺寸有关C . 与二者都有关D . 与二者无关
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