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【单选题】
The "Magic Fields" here are actually _____.
A.
the terraced fields
B.
the farmland of local people
C.
the dams for irrigation
D.
the rimmed stone dams
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】The purpose of introducing artificial variables into the constraint equation is ( ).
A.
reflecting the diversity of variables
B.
changing inequality into equality
C.
make the objective function optimal
D.
form a unit matrix
【单选题】Those upside-down-growing cone-shaped stones are called _____.
A.
stalactites
B.
stalagmites
C.
marble
D.
pebbles
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A.
Electric power
B.
voltage
C.
potential
D.
electricity
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A.
There are unique optimal solutions
B.
There are infinite optimal solutions
C.
There are unbounded solutions
D.
There are no feasible solutions
【单选题】下列双源CT先心病扫描对比剂注射方案错误的是()
A.
5岁以下,浓度320的对比剂注射速率1.0-2.0 ml/s
B.
5岁以上,浓度320的对比剂注射速率2.0-3.0 ml/s
C.
成人,浓度320的对比剂注射速率5.0-6.0 ml/s
D.
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E.
成人选择20G套管针
【单选题】Those bottom-up stones rising from the ground are called _____.
A.
stalactites
B.
stalagmites
C.
marble
D.
pebbles