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【简答题】
下图是某一农业生态系统的结构模式图，请据图回答： (1)该农业生态系统是根据生态系统的______________原理设计的，从生态学角度分析，人们建立上图所示的农业生态系统的主要目的是_____________。 (2)蘑菇在该生态系统中的成分是属于____________。如图所示，在农业生产上，将蘑菇房与蔬菜棚相通，可提高蔬菜产量，其增产的原因是_____________。 (3)在冬天，沼气池产气量减少，有的甚至不能产气，而发酵原料却是充足的，则最可能的原因是____________。 (4)四川省安岳县发现的3例猪链球菌均发生在未建沼气池的农户中，由此可推测链球菌的代谢类型是___________。
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举一反三
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B.
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【单选题】Your vessel has a gasoline engine and a mechanical exhaust ventilation system．BEFORE starting the engine，the exhaust blower should be run long enough to ______．
A.
warm up the exhaust blower motor
B.
provide a proper supply of fresh air for the engine（s）
C.
see the system is in good operating condition
D.
insure at least one complete change of air in the compartments concerned
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【单选题】What does the man offer to do?
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Give the woman directions
B.
Send the woman a brochure
C.
Reserve a seat for the woman
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Waive the woman's registration fee
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【单选题】What point does the author intend to put across in the first paragraph?
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Teaching and research are two contradictory fields.
B.
Research can never be overemphasized.
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The relationship between research and teaching should not be simplified.
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It is not right to overestimate the importance of teaching.
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【单选题】If you were inspecting the valve springs on an auxiliary diesel engine, your best indication of impending spring failure would be ________.
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a glazed surface on the spring
B.
nicks in the protective coating
C.
a build up of sludge deposits
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cracks in the surface of the spring
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【简答题】任务型阅读。 A. The engine in your body. B. The location, size and heartbeat of a heart. C. What happens when the heart beats? D. How does your heart work? E. How do we know about the heart? F. What can a d...
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【判断题】进入的问题是实地研究中的最大难点之一,进入有两层含义,一是进入到研究场地,二是融于研究对象的生活里,进入到研究对象的社会关系中。
A.
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B.
错误
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【单选题】Your vessel has a midships engine room and the cargo is concentrated in the end holds．The vessel is ______．
A.
sagging with tensile stress on main deck
B.
sagging with compressive stress on main deck
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hogging with tensile stress on main deck
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【单选题】Bob is very______, you never know what he is thinking.
A.
conservative
B.
reserved
C.
dead
D.
resent
查看完整题目与答案
【单选题】Your vessel has a gasoline engine and a mechanical exhaust ventilation system．BEFORE starting the engine，the exhaust blower should be run long enough to ______．
A.
warm up the exhaust blower motor
B.
provide a proper supply of fresh air for the engine（s）
C.
see the system is in good operating condition
D.
insure at least one complete change of air in the compartments concerned
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【单选题】What does the man offer to do?
A.
Give the woman directions
B.
Send the woman a brochure
C.
Reserve a seat for the woman
D.
Waive the woman's registration fee
查看完整题目与答案
【单选题】What point does the author intend to put across in the first paragraph?
A.
Teaching and research are two contradictory fields.
B.
Research can never be overemphasized.
C.
The relationship between research and teaching should not be simplified.
D.
It is not right to overestimate the importance of teaching.
查看完整题目与答案
【单选题】What covers your engine?
A.
hod
B.
hode
C.
hodor
D.
hood
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【单选题】If you were inspecting the valve springs on an auxiliary diesel engine, your best indication of impending spring failure would be ________.
A.
a glazed surface on the spring
B.
nicks in the protective coating
C.
a build up of sludge deposits
D.
cracks in the surface of the spring
查看完整题目与答案
【简答题】任务型阅读。 A. The engine in your body. B. The location, size and heartbeat of a heart. C. What happens when the heart beats? D. How does your heart work? E. How do we know about the heart? F. What can a d...
查看完整题目与答案
【简答题】If the engine is ______your car will send out more pollution and consume more gas.
查看完整题目与答案
【判断题】进入的问题是实地研究中的最大难点之一,进入有两层含义,一是进入到研究场地,二是融于研究对象的生活里,进入到研究对象的社会关系中。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Your vessel has a midships engine room and the cargo is concentrated in the end holds．The vessel is ______．
A.
sagging with tensile stress on main deck
B.
sagging with compressive stress on main deck
C.
hogging with tensile stress on main deck
D.
hogging with compressive stress on main deck
查看完整题目与答案