根据《砌筑砂浆配合比设计规程》JGJ98,用强度等级为42.5的水泥制备M15水泥砂浆,每立方米水泥砂浆的水泥用量至少是()。
A. 280kg
B. 350kg
C. 230kg
D. 400kg
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The word "compelling" in line 17 is closest in meaning to()
A. joyous
B. intricate
C. competing
D. forceful
According to the passage, what is the effect of Jupiter's other large moons on Europa()
A. They prevent Europa's subsurface waters from freezing
B. They prevent tides that could damage Europa's surface
C. They produce the very hard layer of ice that characterizes Europa
D. They assure that the gravitational pull on Europa is maintained ar a steady level
The word "forage" in line 1 is closest in meaning to()
A. look up
B. walk toward
C. revolve around
D. search for food
某项目厂区占地面积为60000m2,其中:建筑物占地面积12000m2,构筑物占地面积3600m2,道路和广场占地面积22800m2,露天堆场占地面积3600m2,绿化面积18000m2。经计算,该项目的建筑系数是( )。
A. 20%
B. 260%
C. 32%
D. 70%