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【单选题】
自由沉降的意思是A.
颗粒在沉降过程中受到的流体阻力可忽略不计
B.
颗粒开始的降落速度为零，没有附加一个初始速度
C.
颗粒在降落的只受重力作用，没有离心力等的作用
D.
颗粒间不发生碰撞或接触的情况下的沉降过程
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】多器官功能障碍综合征(MODS)的最主要的发病机制是
A.
炎症反应失控,导致组织细胞损害
B.
炎症细胞激活,炎性物质释放
C.
氧自由基大量释放
D.
内皮细胞损伤
E.
肠道细菌易位
【单选题】－ Has Tom already finished his new story? － I Have no idea. He______it last month.
A.
had written
B.
was writing
C.
would write
D.
wrote
【单选题】— Has Tom already finished his new story? 一 I have no idea. He _____ it last month. [ ]
A.
had written
B.
was writing
C.
would write
D.
wrote
【单选题】多器官功能障碍综合征的最主要的发病机制是
A.
炎症反应失控,导致组织细胞损害
B.
炎症细胞激活,炎性物质释放
C.
氧自由基大量释放
D.
内皮细胞损伤
E.
肠道细菌易位
【单选题】Last month, he wrote me ___letter.
A.
a 1000-words
B.
1000 words
C.
a 1000-word
D.
1000 words’
【单选题】Mr Wang______an article on how to improve spoken English last month, but I don’t know whether he has finished it.
A.
has written
B.
wrote
C.
had written
D.
was writing
【简答题】梁山一百单八将中第一个出场的是谁 ?
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