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【单选题】
已知系统的开环传递函数为 ,则该系统的开环增益为()A.
10
B.
25
C.
5
D.
50
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反馈参考答案：
举一反三
【简答题】go to primary school
【单选题】Although more than 80% of Children in developing countries go to primary school, about 115 million children are not ________. [ ]
A.
being educated
B.
educating
C.
educational
D.
be educated
【单选题】微血管壁受损引起水肿的主要机制是
A.
毛细血管流体静压升高
B.
淋巴回流不足以清除过多的组织液
C.
静脉端的液体静压下降
D.
组织间液的胶体渗透压增高
E.
血管管径增大
【简答题】In America, children go to primary school at age of ______.
【单选题】His son is only four years old. He is _____ to go to primary school this year. [ ]
A.
enough old
B.
too old
C.
not old enough
D.
young enough
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