主页
学科
搜索
账户
常见问题
当前学科：变电运行工考试
题目：
单选
当单相接地电流大于4000A时，规程规定接地装置接地电阻在一年内（）均不超过0.5。
A . A、春秋季节；
B . B、夏季；
C . C、冬季；
D . D、任意季节。
答案：
<查看本题扣1积分>
查看答案
答案不对？请尝试站内搜索
推荐知识点:
脑损伤的神经心理康复不能获得显著效果的是（）
患者女，39岁。广东佛山人，8月份入院。因发热伴皮疹、双下肢骨、关节疼痛3天入院。体检：体温39.3℃，皮肤有散在分布的斑丘疹，伴有痒感，浅表淋巴结未触及，肝肋下仅及，脾未触及，周围血液白细胞总数为3.8×109/L，红细胞数为4.5×1012/L，血小板为7.8×109/L，ALT300U/L，本病患者最可能的诊断是（）
最有助于确定诊断的辅助检查是（）
城市轨道交通信号的基本色为（）、（）、（）三种，再辅以（）、（），构成城轨交通信号的基本显示系统。
（）海大富让韦小宝带多少两银子去“比试”？
在上海地区夏季气温21：00——24：00比13：00——16：00要（）.
“自动校正”键在误差小于（）时，有操作有效.
温度计正常工作指示值应为仪表满量程的()。
A beneficiary has presented a full set of documents under a Credit issued by Bank A confirmed by Bank B provided for deferred payment at 180 days after B/L date to the Nominated Bank C, it examined documents which were complied with the terms and conditions of the credit, it incurred a deferred payment undertaking and at the request of beneficiary, it has discounted and prepaid net amount to the beneficiary. Then it forwarded a full set of documents by courier to the Confirming Bank B for reimbursement at maturity. After some days Nominated Bank C discovered that the beneficiary has escaped for his delivery of a part of forgery documents. On the maturity date in accordance with UCP 600 Article 8a and 8c the confirming Bank B ______ to the Nominated Bank C, because UCP 600 Article 8c stipulates: "A confirming bank's undertaking to reimburse another nominated bank is independent of the confirming bank's undertaking to the beneficiary."
什么是沉淀？试述沉淀的分类及其特点。