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【单选题】
在高频闭锁距离零序保护中，保护停信需带一个短延时，这是为了（）。
A.
防止外部故障时的暂态过程而误动
B.
防止外部故障时功率倒误动
C.
与远方起信相配合，等待对端闭锁信号的到来，防止区外故障时误动
D.
防止内部故障时高频保护拒动
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参考答案：
举一反三
【单选题】袁隆平教授利用普通水稻和一种野生稻培育出了高产而优质的水稻新品种。这种育种方法是（    ）
A.
诱导染色体变异
B.
杂交
C.
诱导基因突变
D.
人工选择
查看完整题目与答案
【单选题】2 How much do they plan to spend on the gift?
A.
$49.99.
B.
$99.99.
C.
$14.
D.
$40.
查看完整题目与答案
【简答题】在项目中创建窗体类ControlFormSize,在窗体中添加一标签控件,编写程序代码,设置窗体的标题、默认关闭方式与窗体大小,然后在标签控件中显示窗体设置的大小
查看完整题目与答案
【单选题】All her energies are ______upon children and she seems to have little time for anything else.
A.
guided
B.
aimed
C.
directed
D.
focused
查看完整题目与答案
【简答题】Gao Yuanyuan, a Beijing girl, is lucky. She seems to have everything that most girls can only dream of. Her pretty face and slim figure were spotted by a talent scout (星探) when she was only 16. Now he...
查看完整题目与答案
【单选题】袁隆平教授利用普通水稻及一种野生稻培育出了高产而优质的水稻新品种。这种育种方法是
A.
诱导染色体变异
B.
杂交
C.
诱导基因突变
D.
人工选择培育
查看完整题目与答案
【单选题】All her energies are ______ upon her children and she seems to have little time for anything else.
A.
guided
B.
aimed
C.
directed
D.
focused
查看完整题目与答案
【单选题】利用染色体变异育种的是
A.
四倍体水稻
B.
三系杂交水稻
C.
“红富士”苹果
D.
“原丰早”水稻品种
查看完整题目与答案
【简答题】利用染色体变异育种的是
查看完整题目与答案
【单选题】How much do they plan to spend on the gi
A.
$49.99
B.
$99.99
C.
$14
D.
$40
查看完整题目与答案
相关题目：
【单选题】袁隆平教授利用普通水稻和一种野生稻培育出了高产而优质的水稻新品种。这种育种方法是（    ）
A.
诱导染色体变异
B.
杂交
C.
诱导基因突变
D.
人工选择
查看完整题目与答案
【单选题】2 How much do they plan to spend on the gift?
A.
$49.99.
B.
$99.99.
C.
$14.
D.
$40.
查看完整题目与答案
【简答题】在项目中创建窗体类ControlFormSize,在窗体中添加一标签控件,编写程序代码,设置窗体的标题、默认关闭方式与窗体大小,然后在标签控件中显示窗体设置的大小
查看完整题目与答案
【单选题】All her energies are ______upon children and she seems to have little time for anything else.
A.
guided
B.
aimed
C.
directed
D.
focused
查看完整题目与答案
【简答题】Gao Yuanyuan, a Beijing girl, is lucky. She seems to have everything that most girls can only dream of. Her pretty face and slim figure were spotted by a talent scout (星探) when she was only 16. Now he...
查看完整题目与答案
【单选题】袁隆平教授利用普通水稻及一种野生稻培育出了高产而优质的水稻新品种。这种育种方法是
A.
诱导染色体变异
B.
杂交
C.
诱导基因突变
D.
人工选择培育
查看完整题目与答案
【单选题】All her energies are ______ upon her children and she seems to have little time for anything else.
A.
guided
B.
aimed
C.
directed
D.
focused
查看完整题目与答案
【单选题】利用染色体变异育种的是
A.
四倍体水稻
B.
三系杂交水稻
C.
“红富士”苹果
D.
“原丰早”水稻品种
查看完整题目与答案
【简答题】利用染色体变异育种的是
查看完整题目与答案
【单选题】How much do they plan to spend on the gi
A.
$49.99
B.
$99.99
C.
$14
D.
$40
查看完整题目与答案
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