10kV及35kV系统发生单相接地时,在什么情况下可采用人工转移接地的方法处理?

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问题:

10kV及35kV系统发生单相接地时,在什么情况下可采用人工转移接地的方法处理?

考点:电气运行类技术电气运行类技术题库
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患者30岁,女性,右上腹持续性痛,腹胀,胸闷,食欲减退,消瘦。实验室检查,甲胎蛋白血清AFP试验阳性血清碱性磷酸酶 (ALP)增高,CT示肝右前叶病灶。

以下有关原发性肝癌的MRI表现,论述错误的是

A.巨块型肝癌内常有脂肪变性、出血、坏死等改变,于T1WI及T2WI可出现不均匀性混杂信号

B.在T1WI上呈稍低信号,边界常不清楚;在T2WI上信号稍高于正常肝组织

C.原发性肝癌在T1WI和T2WI上均为低信号

D.增强后肝癌实质部分增强,边界更清楚

E.MRI门静脉造影可清楚显示有无门静脉癌栓形成

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慢性肾盂肾炎

A.肉芽肿
B.肉芽组织
C.实质样变
D.肉瘤
E.肉眼观脏器表面有凹陷性瘢痕

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In the early 1970’s, Citibank of New York City became one of the first financial institutions to install ATM’s on a large scale. Since then, the (1) of automated teller machines has increased dramatically. At the time, the bank hoped (2) their operating costs by replacing human tellers with machines. Little did they (3) that the cash machines would become so successful. However, as more banks added (4) automated service through ATM’s, the machines mushroomed all over the world.
To use an ATM, all you need is a (5) issued by your bank. Your bank may also (6) through a credit card, such as MasterCard or Visa. To begin a (7) , you need to insert the card into an ATM and punch in a personal identification number on the (8) . The personal ID number may consist of (9) and can prevent anyone from using the card.
The ATM next flashes instructions on its (10) for carrying out transaction. To get cash, for example, you are instructed to (11) that indicate whether the money should be withdrawn from a checking or a savings account and the (12) . This request is then displayed on the screen. After you press a button to (13) that the information is correct, the ATM goes to (14) .
How safe, you may ask, is banking by ATM The (15) is meant to prevent anyone, no matter who you are, from using a cash card (16) . If you enter the wrong ID number for a card, a message on the screen will (17) . If you fail to produce the correct number for three times, most machines will (18) .As another precaution against (19) , the bank generally limits the amount that may be withdrawn by cash card (20) , say, to $ 200.

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对煤矿特种作业人员有哪些要求?

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极限破碎比

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