在某地发现一座古墓,经考古专家初步推断,它可能是一位具有一定身份地位者的墓,墓中有大

题型:单项选择题

问题:

在某地发现一座古墓,经考古专家初步推断,它可能是一位具有一定身份地位者的墓,墓中有大量的随葬品,其中有青铜剑、手抄本的《离骚》、唐三彩、雕版印刷的唐诗、活字印刷的唐诗等。请你根据自己所具有的历史知识,判断这座古墓的朝代最早可能是()

A.战国

B.唐代

C.宋代

D.元代

考点:高中历史科技成就科技成就题库
题型:单项选择题

The giraffe is the tallest modern land animal. It can be over 5. 5 meters tall. Its neck alone may be 1. 9 meters long. Yet the giraffe has only seven bones in its neck, the same number as in the humans’. Even a small bird has many more bones in its neck than a tall giraffe. Each bone in a giraffe’s neck is very long, while the bones in a human’s neck are short. That makes the difference. A female giraffe gives birth to one baby at a time. The baby, called a calf, is about 1. 9 meters tall at birth. By the age of eight it is full-grown. The giraffe eats mostly leaves. Because it has a long neck, it can reach the leaves high up on the trees.

小题1:In this passage the underlined word “giraffe” means _______.

A.鲸鱼

B.长颈鹿

C.大象

D.河马小题2:The bones in a bird’s neck are _______.

A.as big as in a human’s neck

B.as big as in a giraffe’s neck

C.many more than in a human’s neck

D.much smaller in a giraffe’s neck小题3:Which of the following is TRUE?

A.A giraffe has only seven bones.

B.The giraffe is the largest animal on the land.

C.It takes eight years for a giraffe to grow up.

D.Most of the leaves on the trees are eaten up by giraffes.小题4:When a giraffe is born, it is about _______.

A.5. 5 meters long

B.5. 5 meters tall

C.1. 9 meters long

D.1. 9 meters tall小题5:We can guess when a giraffe sees a tiger _______.

A.it will run away as fast as possible

B.it will run to eat the tiger

C.it will make the tiger bring it something to eat

D.it will make one of the smallest animals bring the tiger something to eat

题型:单项选择题
伽利略是意大利文艺复兴运动时期著名的物理学家、天文学家,是近代实验科学的奠基人之一。他热情地宣传和捍卫日心说,触犯了《圣经》和教皇,被判处终身监禁。1983年,罗马教廷正式承认,350年前宗教裁判所对伽利略的审判是错误的。对文中“宗教裁判所”的认识最准确的是 ( )
A.宗教裁判所主要是反对科学创新的一个机构
B.宗教裁判所用野蛮的方式维护自己在人们心目中的权威,巩固在宗教生活中至高无上的地位
C.宗教裁判所能够及时地顺应历史潮流,做出正确决策
D.宗教裁判所反对日心说,因为太阳也不是宇宙的中心
题型:单项选择题

平衡法可消除全部外汇风险。()

题型:单项选择题

某研究性学习小组将一定浓度的Na2CO3溶液滴入CuSO4溶液中得到蓝色沉淀。甲同学认为两者反应只生成CuCO3一种沉淀;乙同学认为这两者相互促进水解,只生成Cu(OH)2一种沉淀;丙同学认为生成了

CuCO3和Cu(OH)2两种沉淀。(查阅资料知:CuCO3和Cu(OH)2均不带结晶水)

(1)按照乙同学的理解,向生成的沉淀中加入________试剂,若观察到________时,就说明乙同学的猜想正确,则Na2CO3溶液和CuSO4溶液反应的离子方程式为:_______________________;

(2)定量探究生成物的成分将沉淀通过_______、洗涤的操作从溶液中分离出来,再低温干燥,然后定量分析沉淀物成分。

(3)若沉淀中CuCO3和Cu(OH)2两者都有,可通过下列所示装置的连接,进行定量分析来测定其质量(设每一装置中的反应或吸收均完全,反应前系统中存在的空气忽略不计)。

①上述各装置连接顺序为_____→_____→_____→_____→_____;

②实验结束时要通入过量的空气,其作用是____________________;

③若沉淀样品的质量为m克,CO2吸收装置质量增加了n克,则沉淀中Cu(OH)2的质量分数为:_____;

④能证明甲同学说法正确的实验现象是____________________。

题型:单项选择题

扰动土试样备样时,将土样(),取代表性土样测定含水率。

A、切成碎块

B、碾压

C、拌和均匀

D、烘干

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