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【多选题】
单相绕组通入交流电流所产生的基波磁动势为 磁动势，其幅值位于 上。A.
脉振
B.
相绕组的轴线
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【单选题】Beginning in October, more than 13,000 McDonald's restaurants in America will use a new kind of cooking oil. McDonald's aims to make its French fries and other fried foods healthier. The change will n...
A.
McDonald's is a pioneer in food products
B.
McDonald's is enlarging its restaurants in the world
C.
fried foods can't keep up with the development of moden society
D.
McDonald's is to use new cooking oil
【简答题】Beginning in October, more than 13,000 McDonald’s (麦当劳)restaurants in America will use a new variety of cooking oil. McDonald’ s aims to make its French fries (油炸食品) and other fried foods healthier. T...
【单选题】Why Don Thompson emphasized McDonald s would be focusing on its core products?
A.
New products taste awful and weird.
B.
Core products are kept quality easily.
C.
New products benefit the company little.
D.
Core products are praised by customers.
【简答题】赤潮和水华
①本为自然现象：
赤潮（red tide）是海洋中某些微小（2-20微米）的浮游藻类、原生动物或更小的细菌，在满足一定的条件下爆发性繁殖或突然性聚集，引起水体变色的一种自然生态现象。
"水华"（water blooms）是一种在淡水中的自然生态现象，只是仅由藻类引起的，如蓝藻（严格意义上应称为蓝细菌）、绿藻、硅藻等。"水华"发生时，水一般呈蓝色或绿色。这两种在自然界就有的赤潮和"...
【单选题】McDonald’s is about to ______ a new advertising campaign McDonald’s is about to ______ a new advertising campaign to promote its new hamburger.
A.
stretch
B.
hunch
C.
render
D.
launch
【简答题】阅读理解。 McDonald's was founded in California in 1940 by brothers Mac and Dick McDonald. McDonald's became a national chain in the 1960s and became well--known for its marketing symbols: a clown (小丑) cal...
【简答题】若系统函数 的极点位于s平面的左半平面,则冲激响应 ____(填增长或衰减);若系统函数 的极点位于s平面的右半平面,则冲激响应 ____(填增长或衰减);
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