皮皮学，免费搜题
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搜题
【单选题】
血液能不停地在血管、心脏组成的封闭的管道内循环流动，其动力来自（　　）
A.
心脏有节律的收缩和舒张
B.
动脉的收缩和舒张
C.
静脉的收缩和舒张
D.
骨胳肌的收缩和舒张
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【单选题】In purification, there is no fuel oil in the clean oil outlet.It could be caused by _____. I.too high temperature of the dirty fuel oil; II. too low temperature of the dirty fuel oil; III. Clogged fil...
A.
I
B.
I.II.III
C.
II.III
D.
II
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【单选题】Which one is not included in the water pollution purification materials?
A.
Redox material
B.
Precipitation separation material
C.
Solid liquid separation material
D.
Purification catalyst
查看完整题目与答案
【多选题】城市道路分为几类?
A.
快速路
B.
主干路
C.
次干路
D.
支路
查看完整题目与答案
【单选题】To receive oil residues from the purification of fuel and lubricating oils in the machinery spaces, what kind of tank(s) should be provided on board?
A.
bilge tank
B.
sludge tank
C.
overflow tank
D.
oil collecting tank
查看完整题目与答案
【简答题】城市道路分为哪几类?
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【简答题】城市道路有哪些功能？城市道路分为哪几类？
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【单选题】In purification, light phase is escaping together with the heavy one. This indicates that ____.
A.
the bowl is clogged
B.
the liquid seal is broken
C.
the bowl is clogged, or the liquid seal is broken
D.
the throughput is too low
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【单选题】The gel below illustrates the purification of the RecA protein from E. coli. This gel was loaded from the top. Which statement BEST describes how proteins “run” in an SDS gel?
A.
The proteins are separated primarily by molecular weight—the largest MW proteins are on the bottom, and the smallest are on the top.
B.
The proteins are separated primarily by molecular weight—the smallest MW proteins are on the bottom, and the largest are on the top.
C.
The proteins are separated primarily by charge—the protein with the smallest pI is on the top, and the protein with the largest pI is on the bottom.
D.
The proteins are separated primarily by charge—the protein with the largest pI is on the top, and the protein with the smallest pI is on the bottom.
E.
The proteins are separated primarily by their propensity to precipitate—as electrophoresis progresses, the heat generated by the current denatures proteins faster or slower. The slowest to denature is on the bottom, and the fastest to denature is on the top.
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【简答题】城市道路分为几类 ?
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【单选题】In purification, the separator should be checked the following items except that ______.
A.
The throughput is constant
B.
The working temperature is constant
C.
The oil does not leak from the worm gear housing
D.
The brake is released
查看完整题目与答案
相关题目：
【单选题】In purification, there is no fuel oil in the clean oil outlet.It could be caused by _____. I.too high temperature of the dirty fuel oil; II. too low temperature of the dirty fuel oil; III. Clogged fil...
A.
I
B.
I.II.III
C.
II.III
D.
II
查看完整题目与答案
【单选题】Which one is not included in the water pollution purification materials?
A.
Redox material
B.
Precipitation separation material
C.
Solid liquid separation material
D.
Purification catalyst
查看完整题目与答案
【多选题】城市道路分为几类?
A.
快速路
B.
主干路
C.
次干路
D.
支路
查看完整题目与答案
【单选题】To receive oil residues from the purification of fuel and lubricating oils in the machinery spaces, what kind of tank(s) should be provided on board?
A.
bilge tank
B.
sludge tank
C.
overflow tank
D.
oil collecting tank
查看完整题目与答案
【简答题】城市道路分为哪几类?
查看完整题目与答案
【简答题】城市道路有哪些功能？城市道路分为哪几类？
查看完整题目与答案
【单选题】In purification, light phase is escaping together with the heavy one. This indicates that ____.
A.
the bowl is clogged
B.
the liquid seal is broken
C.
the bowl is clogged, or the liquid seal is broken
D.
the throughput is too low
查看完整题目与答案
【单选题】The gel below illustrates the purification of the RecA protein from E. coli. This gel was loaded from the top. Which statement BEST describes how proteins “run” in an SDS gel?
A.
The proteins are separated primarily by molecular weight—the largest MW proteins are on the bottom, and the smallest are on the top.
B.
The proteins are separated primarily by molecular weight—the smallest MW proteins are on the bottom, and the largest are on the top.
C.
The proteins are separated primarily by charge—the protein with the smallest pI is on the top, and the protein with the largest pI is on the bottom.
D.
The proteins are separated primarily by charge—the protein with the largest pI is on the top, and the protein with the smallest pI is on the bottom.
E.
The proteins are separated primarily by their propensity to precipitate—as electrophoresis progresses, the heat generated by the current denatures proteins faster or slower. The slowest to denature is on the bottom, and the fastest to denature is on the top.
查看完整题目与答案
【简答题】城市道路分为几类 ?
查看完整题目与答案
【单选题】In purification, the separator should be checked the following items except that ______.
A.
The throughput is constant
B.
The working temperature is constant
C.
The oil does not leak from the worm gear housing
D.
The brake is released
查看完整题目与答案