[判断题]附着升降脚手架的水平梁架及竖向主框架在两相邻附着支撑结构处的-我要搜题网

[不定项选择题]共用题干 Dark Forces Dominate Universe

The earth,moon,sun and all visible stars in the sky make up less than one percent of
the universe.Almost all the rest is dark matter and dark energy,unknown forces that
_______(1)astronomers.
Observations in recent years have changed the basic_______(2)of how the
universe evolved and have indicated how little is known about the major forces and
substances that_______(3)our world.
Astronomers now know that luminous（发光的）matter一stars , planets and hot gas一
accounts_______(4)only about 0.4 percent of the universe.Non-luminous
components , such as black holes and intergalactic（星系间的）gas,_______(5)
up 3.6 percent.The rest is either dark matter,about 23 percent,or dark energy,about
73 percent.
Dark matter,sometimes_______(6)"cold dark matter,"has been known for some time.Only recently have researchers come to understand the key role it_______ (7)in the formation of stars,planets and even people.
"We_______(8)our very existence to dark matter,"said physicist Paul
Steinhardt and a co-author of a review on dark matter which_______(9)not long ago
in the journal Science.
"Dark matter dominated the structure_______(10)in the early universe,"
Steinhardt said."For the first few billion years dark matter contained most of the mass of the
universe. You can think of ordinary matter_______(11)a froth（泡沫）of an ocean
of dark matter. The dark matter clumps（结成块）and the ordinary matter falls into it. That
_______(12) to the formation of the stars and galaxies（星系）."
Without dark matter,"there would be virtually no structures in the universe,"
The nature of dark matter is_______(13).It cannot be seen or detected
directly. Astronomers know it is there because of its_______(14) on celestial（天体
的）objects that can be seen and measured.
But the most dominating force of all in the universe is called dark energy,a recently
________(15)power that astronomers say is causing the galaxies in the universe to
separate at a faster and faster speed. _________(3)
A.changed
B.described
C.designed
D.shaped

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[单选题] 【考核点:0108040101013;题型:单选题;难度:难;类型:专业】
集散控制系统的系统直流工作接地接地电阻要求一般不能超过( )Ω。
A.1Ω;
B.4Ω;
C.3Ω;
D.5Ω;

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[单选题]安全生产标准化评审分为()级,()级为最高。
A.二级;二级
B.四级;四级
C.三级;一级

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[多选题]( )项目不收取系统备用费。
A.分布式光伏发电
B.核电
C.分布式天然气发电
D.分布式风电

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[单选题]测量漏缆的检验方法不包括( )。
A.万用表测量电阻
B.直流电桥
C.耐压测试仪
D.驻波比测试电桥

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[单项选择]某程序的目标代码为16384个字节，将其写到以字节编址的内存中，以80000H为首地址开始依次存放，则存放该目标程序的末地址为______。
A. 81000H
B. 83FFFH
C. 84FFFH
D. 86000H

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[单选题]电网减供负荷是指电力调度控制中心统一调度的电网在事故发生期间的（）最大减少量
A.极限负荷
B.平均负荷
C.实际负荷
D.最高负荷