皮皮学，免费搜题
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【单选题】
What does "this kind of entrepreneurial approach" in the last paragraph mean?A.
Prof. Cui doesn't rely on government funding. Instead he runs a for-profit business.
B.
Prof. Cui is bold in his submarine design.
C.
Prof. Cui, who started the company, is a professor-turned entrepreneur.
D.
Prof. Cui is the first to offer his ship for tourists.
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皮皮学刷刷变学霸
举一反三
【单选题】按接近开关的接线图,将继电器KA的正极接到+24V,继电器的负极接到接近开关的输出端。当有金属物体靠近接近开关,两者的间距小于动作距离时,接近开关的输出端(多数为黑色)从高电平跳变为低电平,继电器动作。可以判断,该接近开关的输出类型属于( )型。
A.
PNP
B.
NNP
C.
PPN
D.
NPN
【简答题】金融压抑论认为在经济相对落后的发展中国家，企业投资主要依赖（）。