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【单选题】
实验中的差动放大电路属于( )式A.
基本
B.
长尾
C.
恒流源
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】羊水过多但仍为正常胎儿者,正确的处理方法是()[单选题]
A.
缩宫素引产
B.
立即剖宫产
C.
胎吸引产
D.
应根据羊水过多的程度与胎龄决定处理方法
E.
顺其自然,无需处理
【单选题】Toward the prospect of peer-to-peer renting, the author's attitude can be said to be______.
A.
objective
B.
pessimistic
C.
suspicious
D.
optimistic
【多选题】Task 2: Listen to the audio clip again. Choose the statements from the following that are true about peer-to-peer learning and peer-to-peer grading for online learning.
A.
Students are reluctant to learn with and from each other on a digital campus.
B.
Peer-to-peer learning is a core component of an open online course.
C.
Students ensure quality control by voting for helpful responses.
D.
Students have to finish many multiple choice questions online.
E.
Students can make assessments of others’ work and provide qualitative feedback.
【简答题】一台国产三相异步电动机,额定功率为 4kW ,额定电压为 380V ,额定转速为 960r/min ,效率 为 78% ,额定功率因数为 0.77 ,则其额定输出转矩为 ____________ N · m 。 55. 上题中, 额定转差率为 ____________ ,额定状态下,转子绕组中电流的频率为 ___________ Hz 。
【多选题】Listen to the audio clip again. Tick the statements that are true about peer-to-peer learning and peer-to-peer grading for online learning.
A.
Students are reluctant to learn with and from each other on a digital campus.
B.
Peer-to-peer learning is a core component of an open online course.
C.
Students ensure quality control by voting for helpful responses.
D.
Students have to finish many multiple choice questions online.
E.
Students can make assessments of others’ work and provide qualitative feedback.
【单选题】关于peer-to-peer (or P2P)网络，下面哪句话是正确的？
A.
一个 peer是参考模型某层上的一个peer entity。
B.
一个 peer既是一个服务端，也是一个客户端。
C.
Peer用户越少，网络越快。
D.
上述说法都不对。
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