题目内容

降压启动的直流电动机控制电路是指直流电动机启动时,将启动()串入直流电动机中,限制启动电流,当直流电动机低速旋转一段时间后,再把启动变阻器从电路中消除(使之短路),使直流电动机正常运 转

A. 电阻
B. 电容
C. 二极管
D. 三极管

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人口增长速度过快,新增人口数量过多,学龄人口猛增,幼儿教师增长速度过快,就会造成幼儿园教师数量短缺、园舍不够等问题

A. 对
B. 错

交流电动机控制线路主要由交流()(单相或三相)、()部件和()部件构成

A. 电动机
B. 控制
C. 保护

Time-honored brands need innovation to surviveDrinking herbal tea is a longtime tradition here in Guangzhou, mostly due to the city’s moist and hot weather. Cooked through boiling Chinese herbal medicine, herbal tea helps 1. ________ body heat and humidity. A wisdom handed down from ancestors centuries ago, herbal tea has become popular nationwide. “Wanglaoji” is the best-known local brand, dating back to 1828.This year alone, Wanglaoji has opened four new stores in Guangzhou. Pop culture elements are now incorporated into the 2. ________ design. Some even buy it from e-commerce platforms like JD.com.However, such success for an old Chinese brand that retains its popularity still today, is quite rare. There are around 1,200 so-called “China time-honored brands” designated by the Ministry of Commerce, but only a handful of them are operating in good conditions. One expert says a lack of 3. ________ is the main reason for their decline.But why should it matter whether these time-honored brands survive or die? Wang says they represent the essence of China’s business civilization, therefore should be protected. Furthermore, some of them have core identities, which helps them gain international 4. ________. The key, Wang says, is to think beyond “exporting” your products.“First you need to keep innovating your product. Secondly, try to solve problems for international customers, meeting their demands. Thirdly, set up branches overseas, hire locals to 5. ________ your product, and create public good.”Having already penetrated Southeast Asian and American markets, Wanglaoji has the ambition of becoming China’s Coca-cola. On that note, Professor Wang believes the country’s cultural 6. ________ will be the crucial factor. He says China should continue to build its soft power as it nurtures more globally influential brands.

货币政策的挤出效应是指利率水平下降后一部分的资金流向了投机市场的现象。

A. 对
B. 错

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