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【单选题】
长期平均成本曲线 呈“U”型 原因是( )
A.
规模报酬的变化所致
B.
规模经济与规模不经济所致
C.
生产要素的边际生产率所致
D.
固定成本与可变成本所占比重所致
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参考答案：
举一反三
【单选题】When an injury occurs, which type of cells has the ability of recognizing microbes and necrotic cells and releasing mediators such as histamine that cause smooth muscle cells to relax?
A.
mast cells
B.
macrophages
C.
dendric cells
D.
basophils
查看完整题目与答案
【单选题】日俄战争后双方签订【 】,日本如愿以偿地从俄国手中得到了中东铁路的南满铁路以及旅大地区的租借权,为侵略中国东北埋下伏笔。
A.
日内瓦和约
B.
朴茨茅斯条约
C.
雅尔塔协议
D.
马关条约
查看完整题目与答案
【单选题】Which components are the source of serotonin which causes smooth muscle cells to contract?
A.
platelets
B.
lymphocytes
C.
monocytes
D.
basophils
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【判断题】Fatty streaks are composed of smooth muscle cells.
A.
正确
B.
错误
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【多选题】以下帝王陵寝封土魏“宝城宝顶”的是()
A.
汉茂陵
B.
明显陵
C.
唐乾陵
D.
清西陵
E.
明十三陵
查看完整题目与答案
【单选题】Slow waves in small intestinal smooth muscle cells are
A.
action potentials
B.
phasic contractions
C.
tonic contractions
D.
oscillating resting membrane potentials
E.
oscillating release of cholecystokinin(CCK)
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【单选题】The ion base generated by the action potential of the smooth muscle cells of the digestive tract is（ ）
A.
K+ inflow
B.
Na+ inflow
C.
Ca2+ inflow
D.
Ca 2+ and  K + inflow
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【单选题】About the smooth muscle cells, which is wrong( )
A.
elongated fusiform cells
B.
mononuclear
C.
contain thick filaments, thin filaments and intermediate filaments
D.
without cross striations
E.
have myofibrils
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【简答题】Smooth muscle cells are ____________, which means they don’t have stripes.
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【简答题】预制桩打桩桩锤一般可分几类落锤、蒸汽锤、 和液压锤。
查看完整题目与答案
相关题目：
【单选题】When an injury occurs, which type of cells has the ability of recognizing microbes and necrotic cells and releasing mediators such as histamine that cause smooth muscle cells to relax?
A.
mast cells
B.
macrophages
C.
dendric cells
D.
basophils
查看完整题目与答案
【单选题】日俄战争后双方签订【 】,日本如愿以偿地从俄国手中得到了中东铁路的南满铁路以及旅大地区的租借权,为侵略中国东北埋下伏笔。
A.
日内瓦和约
B.
朴茨茅斯条约
C.
雅尔塔协议
D.
马关条约
查看完整题目与答案
【单选题】Which components are the source of serotonin which causes smooth muscle cells to contract?
A.
platelets
B.
lymphocytes
C.
monocytes
D.
basophils
查看完整题目与答案
【判断题】Fatty streaks are composed of smooth muscle cells.
A.
正确
B.
错误
查看完整题目与答案
【多选题】以下帝王陵寝封土魏“宝城宝顶”的是()
A.
汉茂陵
B.
明显陵
C.
唐乾陵
D.
清西陵
E.
明十三陵
查看完整题目与答案
【单选题】Slow waves in small intestinal smooth muscle cells are
A.
action potentials
B.
phasic contractions
C.
tonic contractions
D.
oscillating resting membrane potentials
E.
oscillating release of cholecystokinin(CCK)
查看完整题目与答案
【单选题】The ion base generated by the action potential of the smooth muscle cells of the digestive tract is（ ）
A.
K+ inflow
B.
Na+ inflow
C.
Ca2+ inflow
D.
Ca 2+ and  K + inflow
查看完整题目与答案
【单选题】About the smooth muscle cells, which is wrong( )
A.
elongated fusiform cells
B.
mononuclear
C.
contain thick filaments, thin filaments and intermediate filaments
D.
without cross striations
E.
have myofibrils
查看完整题目与答案
【简答题】Smooth muscle cells are ____________, which means they don’t have stripes.
查看完整题目与答案
【简答题】预制桩打桩桩锤一般可分几类落锤、蒸汽锤、 和液压锤。
查看完整题目与答案
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