变压器漏感对整流电路的影响包括:出现换相重叠角,整流输出电压平均值Ud降低,整流电路的工作状态增多。
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变压器漏感使得换相时晶闸管电压出现缺口,产生正的du/dt,可能使晶闸管烧毁,为此必须加吸收电路。此外,换相使电网电压出现缺口,成为干扰源。
A. 对
B. 错
小明自幼父母双亡,爷爷奶奶也早已去世,只剩大伯一个亲人,相依为命,小明十分尊敬和爱戴大伯,大伯也为了悉心照顾小明一直未能结婚生子,但却没有办理对小明的扶养手续,后大伯突然因病去世。小明非常伤心,在办完丧礼后,要处理大伯的遗产。请问,小明可以继承大伯遗产吗?下列说法正确的是()。7
A. 小明不可以继承大伯的遗产
B. 小明可以代位继承大伯的遗产
C. 大伯无子女,他的遗产属于无人继承范畴,应归公
D. 小明可以顺位继承
Which of the following is not O2O related?
A. Restaurant.com
B. FedEx
C. Groupon
D. SpaFinder
Which of the following is wrong about O2O commerce?
A. It is a combination of payment model and foot traffic generator for merchants that creates offline purchases.
B. It finds consumers online and brings them into real-world stores.
C. It tracks conversion using things like cookies and pixels.
D. The performance of an O2O commerce company is readily quantifiable.