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【单选题】
人参主根横切面上有( )A.
树脂道
B.
油室
C.
油管
D.
乳管
E.
星点状维管束
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反馈参考答案：
举一反三
【单选题】_______ energy under the earth must be released in one form or another, for example, an earthquake. [ ]
A.
Accumulated
B.
Gathered
C.
Assembled
D.
Collected
【简答题】________ energy under the earth must be released in one form. or another, for example, an earthquake. A) Accumulated B) Gathered C) Assembled D) Collected
【单选题】Nuclear energy, despite its early promise a source of eleetrical power, is still under dispute____old and safe energy sources.
A.
in compared with
B.
in compared to
C.
compared with
D.
compared to
【单选题】人们常说婚姻有“七年之痒”,从经济学来说,这是因为( )
A.
人的欲望是无穷无尽的
B.
人都有自由选择的权利
C.
婚姻也存在边际效用递减规律
D.
人都希望获得消费者剩余
【简答题】______ represents the energy per unit volume of a material required to produce fracture under static conditions. A) Modulusofelasticity B) Modulusoftoughness C) Modulusofresilience D) Modulusofrigidit...
【单选题】Energy ______ under the earth must give off in one form or another, for example, an earthquake. [ ]
A.
gathering
B.
collected
C.
accumulated
D.
assembled
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