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【单选题】
硅整流发电机的中性点电压等于发电机直流输出电压的()
A.
1 / 2
B.
1 倍
C.
1 / 3
D.
1/6
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皮皮学刷刷变学霸
举一反三
【单选题】跟什么人说什么话”是商务礼仪 特征的喻意
A.
规范性
B.
对象性
C.
制度性
D.
针对性
【单选题】听力原文:The new nepotism operates not from the top down but from the bottom up: it is voluntary, not coercive it springs from the initiative of children, not the interest of the parents it tends to seem ...
A.
Parents maximized the family advantages for the benefits of their children.
B.
Parents gave full respect to the likes and dislikes of their children.
C.
Children had their own choice of career and marriage.
D.
Children willingly lived on the expectations of their families.
【判断题】热水供应系统包括第一循环系统和第二循环系统,其中第一循环系统又叫做热水供应系统。
A.
正确
B.
错误
【单选题】某技术方案的总投资 1500 万元,其中债务资金 700 万元,技术方案在正常年份年利润总额 400 万元,所得税 100 万元,年折旧费 80 万元。则该方案的资本金净利润率为( )。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
26.7% prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
B.
37.5% prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
C.
42.9% prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
D.
47.5% prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】What does the author indicate in the last paragraph?
A.
From the top to the bottom, the water falls 3,200 feet.
B.
These falls are more than 1,000 feet higher than any other falls in the world.
C.
From the top to the bottom, the water falls a bit less than 3,200 feet.
D.
Both A and B
【单选题】一般将人为原因引起的环境问题称为()。
A.
原生环境问题
B.
生态环境问题
C.
第一环境问题
D.
第二环境问题
【单选题】n 个变量可以构成 个最小项。
A.
2n-1
B.
2n
C.
2 n
D.
n
【判断题】制冷系统包括制冷循环系统、冷却水循环系统、润滑油循环系统、载冷剂循环系统(如:空调冷冻水),其中制冷循环最为复杂和重要,通常制冷系统亦即制冷剂循环系统。
A.
正确
B.
错误
【判断题】电压负反馈稳定输出电压,电流负反馈稳定输出电流。()
A.
正确
B.
错误
【单选题】We can see clearly from the top of the building         it is that the police are talking to.
A.
what        
B.
where      
C.
that        
D.
who
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