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【多选题】
短路电流计算条件包括：( )。A.
短路前三相系统应是正常运行情况下的接线方式，不考虑仅在切换过程中短时出现的接线方式
B.
设定短路回路各元件的磁路系统为不饱和状态，即认为各元件的感抗为一常数
C.
假定短路发生在短路电流为最大值的瞬间；所有电源的电动势相位角相同；所有同步电机都具有自动调整励磁装置(包括强行励磁)
D.
电路电容和变压器的励磁电流略去不计
E.
系统中所有电源都在额定负荷下运行
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【简答题】根据测站的性质和作用,水文测站可分为( )、( )和( )
【简答题】根据测站的性质和作用，水文测站可分为( )站、( )站和实验站。
【单选题】Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened【B1】. As was discussed before, it wa...
A.
between
B.
before
C.
since
D.
later
【单选题】Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, i...
A.
brought
B.
followed
C.
stimulated
D.
characterized
【单选题】对于电位滴定法,下面哪种说法是错误的
A.
在酸碱滴定中，常用pH玻璃电极为指示电极，饱和甘汞电极为参比电极
B.
弱酸弱碱以及多元酸(碱)不能用电位滴定法测定
C.
电位滴定法具有灵敏度高，准确度高，应用范围广等特点
D.
在酸碱滴定中，应用电位法指示滴定终点比用指示剂法指示终点的灵敏度高得多
E.
电位滴定法中内插法是基于二阶导数法
【单选题】对于电位滴定法，下面哪种说法是错误的是（）
A.
在酸碱滴定中，常用pH玻璃电极为指示电极，饱和甘汞电极为参比电极
B.
弱酸、弱碱以及多元酸（碱）不能用电位滴定法测定
C.
电位滴定法具有灵敏度高、准确度高、应用范围广等特点
D.
在酸碱滴定中，应用电位法指示滴定终点比用指示剂法指示终点的灵敏度高得多
【单选题】对于电位滴定法,下面哪种说法是错误的
A.
在酸碱滴定中，常用pH玻璃电极为指示电极，饱和甘汞电极为参比电极
B.
弱酸、弱碱以及多元酸（碱）不能用电位滴定法测定
C.
电位滴定法具有灵敏度高、准确度高、应用范围广等特点
D.
在酸碱滴定中，应用电位法指示滴定终点比用指示剂法指示终点的灵敏度高得多
【单选题】Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened【C1】______ . As was discussed before...
A.
between
B.
before
C.
since
D.
later
【单选题】Comparisons were drawn between the development of television in the 20th century and the diffusion of printing in the 15th and 16th centuries. Yet much had happened 【21】______ . As was discussed befor...
A.
between
B.
before
C.
since
D.
later
【判断题】体育文化虽是一个相对独立的世界,但并不是孤立存在的,而是在与政治、经济等的其它诸社会因素互相影响的过程中维持自己的体系的,是在被社会承认的条件下发挥着自己的作用的。
A.
正确
B.
错误
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