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【单选题】
硅稳压二极管与整流二极管不同之处在于( )。A.
稳压管不具有单向导电性
B.
稳压管可工作在击穿区，整流二极管不允许
C.
整流二极管可工作在击穿区，稳压管不能
D.
稳压管击穿时端电压稳定，整流管则不然
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反馈参考答案：
举一反三
【简答题】Probably capoeira, which is a Brazilian dance, martial art, fight thing. It's 3) of all these things. And yes, that was very difficult because there were lots of unusual 4) to learn.
【单选题】教学中“拔苗助长“陵节而施”违背了( )。
A.
个体身心发展的阶段性规律
B.
个体身心发展的顺序性规律
C.
个体身心发展的不均衡性规律
D.
个体身心发展的个别差异性规律
【多选题】Why this sort of entrepreneurial extravagance is not a bad thing at all?
A.
These vast and risky investments can be seen as essentially a way of recycling the enormous funds that successful firms and individuals have accumulated from you, the customer.
B.
Better to re-deploy one’s fortune chasing breakthrough dreams in the sky than on palatial corporate headquarters, private islands, larger yachts, and sometimes even huge charitable contributions.
C.
The entrepreneurial extravagance can bring people many benefits, which leads a more competitive market and higher work initiative.
D.
The extravagance promotes technology to move quickly, and during the process people increase their ability to innovate, which is a virtuous circle.
【简答题】The one thing common to all of these access systems is______.
【单选题】And if you’ve been to Shanghai many times already and have seen all these sights, then ( ) use the rest of your time to do the one thing Shanghai is best known for: shopping, shopping, shoppin...
A.
which
B.
in which
C.
that
D.
in that
【简答题】在平衡膳食中()应该占有“主食”的地位，提供的能量应当达到总膳食能量的50-60%。 ①谷类食物 ②薯类食物 ③动物性食物
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