造成逆变失败的原因有()、()、()、()等几种。
参考答案:逆变桥晶闸管或元件损坏;供电电源缺相;逆变角太小;触发脉冲丢失或未按时到达
下列关于质押和抵押的区别,说法不正确的是()。
A.抵押权的设立不转移抵押标的物的占有,而质权的设立必须转移质押标的物的占有
B.抵押中的债权取得抵押财产的所有权或部分所有权,质押中的债务人保持对质押财产的占有权
C.在抵押担保中,抵押物价值大于所担保债权的余额部分,可以再次抵押
D.质权的标的物为动产和财产权利
A figure that can be folded over along a straight line so that the result is two equal halves which are then lying on top of one another with no overlap is said to have a line of symmetry. Which of the following figures has only one line of symmetry
A.Square
B.Circle
C.Equilateral triangle
D.Isosceles triangle
E.(E) Rectangle