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【判断题】
先成岩石风化产物、火山喷发沉降物、生物成因的各种有机物，甚至宇宙尘，成为沉积物的物质来源。故沉积物依据其成因与性质可分为碎屑沉积物、化学沉积物和有机沉积物。A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】A．abilities B．qualities C．powers D．possibilities
【简答题】在诸多生态因子中,使生物的耐受性____或____极限时,生物的生长发育、生殖、活动和分布等直接受到限制,甚至死亡的因子,叫做____。
【单选题】For a self-sufficient producer, the production possibilities frontier
A.
is the same as the consumption possibilities frontier.
B.
is greater than the consumption possibilities frontier.
C.
is less than the consumption possibilities frontier.
D.
is always a straight line.
【单选题】Which procedure will generate the "Edge effect" in the TLC experiment?
A.
Poor spotting
B.
Poor saturation
C.
Unsuitable developing solvents
D.
Poor TLC plate itself
【简答题】粒子类型中 的参数设置可以参照发射器类型中的图层设置原理。
【单选题】A relationship that shows the technological possibilities for an economy as a whole is called a
A.
production function.
B.
utility possibilities frontier.
C.
production possibilities frontier.
D.
budget constraint.
【简答题】A．abilities B．potentials C．capabilities D．possibilities
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