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【单选题】临界比例度法整定控制器参数，是在()控制作用运行下，通过试验，得到临界比例度δk和临界振荡周期Tk，然后根据经验公式求出各参数值。
A.
纯积分
B.
纯微分
C.
纯比例
D.
比例、积分、微分
【单选题】The reason why muscle glycogen breakdown cannot directly replenish blood glucose is
A.
l ack of glucose-6-phosphatase
B.
l ack of p hosphorylase
C.
l ack of debranching enzyme
D.
l ack of h exokinase
E.
l ow c ontents of m uscle glycogen
【多选题】Which of the following is the reason why we should learn a second language?
A.
B ecause b y learning a second language, and perhaps even more, we can understand each other better and deal with each other with more empathy and consideration.
B.
Because m ost countries today, because of increasing urbanization, international commerce, tourism, business travel, and modern technology have begun to embrace the concept of a society that is multicultural. And evidently, a globalized multicultural society would naturally be multilingual.
C.
Leaning a second language makes you have the ability to communicate with the others.
D.
B ecause l earning a second language not only challenges your mind, but also enriches your soul, so to speak.
【单选题】The increasing number of cars on the road _______ traffic. This was the reason why we couldn’t get here on time.
A.
choked back
B.
choked down
C.
choked out
D.
choked up with
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