【判断题】颗粒级配一般是三种以上的粒径,级配最为合理。
【单选题】The Sumerians invented the writing system known as ________ .
【单选题】Which of the following can be inferred from the passage concerning the Sumerians?
A.
They were descendants of the Persians.
B.
They were the first people to cultivate the valley of the Tigris.
C.
They were accomplished musicians.
D.
They had the beginnings of an economy.
【单选题】The great achievements of Sumerians in astronomy .
A.
inventing duodecimal number system
【单选题】According to the passage, by the year 3000 B.C. the Sumerians had already done all of the following EXCEPT:
A.
They had abandoned the area north of the Persian Gulf.
B.
They had established themselves in cities.
C.
They had started to communicate through
D.
They had created bronze tools and weapons.
【单选题】The ancient Sumerians began fermenting beer from barley at least 6,000 years ago.
【判断题】轮班原则是轮班要严格遵守有关规定,原则上每月工时不能超出公司规定,并每月要确保员工休息时间符合有关规定。