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【简答题】
复合层理包括 1 、 2 及 3 。这些层理主要出现在细砂岩、粉砂岩、粉砂质泥岩中。在沉积物中常见,也称潮汐复合层理。波纹交错层理是层系界面和纹层均呈连续的或不连续的 4 ,纹层与层系界面相交的层理。爬升层理也称攀升层理、爬升沙纹层理,指携带大量细砂、粉砂的流水流动过程中,形成小型流水波痕,在波痕的迁移过程中,波痕 5 不发生冲蚀或发生不同程度的沉积,使得波痕在向前迁移的同时生长,在沉积物内部留下的构造就是爬升层理。 从 “ 波状层理、水平层理、斜层理、透镜状层理、交错层理、脉状层理、波状、水平状、迎流面、背流面 ” 中选择恰当的恰当词语填空 。
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皮皮学刷刷变学霸
举一反三
【判断题】馏程是指一种液体在标准压力[101.3kPa(760mmHg)]下,自开始馏出第5滴算起,至供试品公剩3~4ml或一定比例的容积馏出时的温度范围。
A.
正确
B.
错误
【简答题】( ) 是全国最大的钾镁盐矿床。
【单选题】Why does the author dwell upon the concept of science in this article?
A.
He wants to get the name right for scientists who are not in the field of exact science.
B.
He wants to show that scientists can be wrong.
C.
He just wants to show the right concept to the confused people.
D.
He wants to make the concept clear so that people can have the right education.
【多选题】Situation 5: A business associate of yours has written to you to inquire about a delay in the delivery of an order. You have checked with the shipping department and found that the order left on time ...
A.
Self-introduction
B.
Pleasantry
C.
Information
D.
Inquiry
E.
Request
F.
Persuasion
【单选题】在一次较大运动量锻炼后,或是隔了较长的时间没有锻炼,刚开始锻炼之后,往往会出现肌肉酸痛,这种酸痛不是发生在运动结束后即刻,而是发生在运动结束后1-2天内,因此称()。
A.
肌肉反复性酸痛
B.
肌肉延迟性酸痛
C.
肌肉重复性酸痛
D.
肌肉后续性酸痛
【单选题】What remained unchanged in spite of all the challenges in family life?
A.
The concept of 'the family' as a social unit.
B.
The attitudes to birth control.
C.
The attitudes to religion.
D.
The ideas of authority and tradition.
【简答题】Households and the business environment in Guinea, Senegal and the Gambia are increasingly plagued by frequent power outages, to such a degree that it has become a top political issue. Now, technician...
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