状态估计软件应具有( )。 A.产生电网计算用的母线和网络模型; B.很强的开关错

题型:多项选择题

问题:

状态估计软件应具有( )。

A.产生电网计算用的母线和网络模型;

B.很强的开关错误辨识能力;

C.对遥测数据中不良数据进行检测和辨识能力;

D.对变压器分接头位置估计,母线负荷预报、量测误差分析统计屏蔽修改等。

考点:注册电气工程师发输变电专业继电保护、安全自动装置及调度自动化
题型:多项选择题

C

  Several years ago I worked in an office, which I had a locust tree growing outside the window. It had grown into a tall tree and must have been there for a long time. The tree blocked the view and made the office seem dull, unfortunately this happened to be the room assigned to me and I was depressed by it for quite some time.

  When the first spring came, everything was green except the locust tree. Secretly, I was very happy because I had thought it had died.

  One morning when I opened the window for fresh air, I unexpectedly smelt a familiar sweet scent floating into my office but I couldn’t name it. Suddenly, I realized it was the locust tree! The tree that I thought dead was blossoming in full glory.

  From then on, I usually came to the office very early to see dew forming on the locust tree blossoms and every year was eager to see spring again.

  During summer, the green leaves provided shade protecting me from the harsh sunlight, but allowing enough light in to make it pleasant. In autumn, the leaves turned into many different colors. Its beauty touched my soul. Many times I thought to take photos but never did. Then I had to leave in a hurry. Later in life it became a great regret that I had not done so.

  Actually, many times in our lives, we think we own something, therefore we don’t cherish it. We don’t feel regretful until we lose it one day! Moreover, sometimes, we have to accept the things we don’t want and need to discover the hidden beauty to find unexpected joy!

59.The author of the passage employed a writing way ________.

A.of holding and releasing            B.that released first, then held

C.that held first, then released         D.that was not holding or releasing

60.What the author wanted to tell us is that ________.

A.not being delighted for what you have got and not feeling pity on the lost

B.think twice before you leap

C.treat everything calmly

D.cherish what you’ve owned

61.The reason the author came to the office early is ________.

A.to enjoy the dew                 B.to finish her work early

C.to do some cleaning              D.to avoid the burning sun

62.The underlined word “so” in the fifth paragraph perhaps refers to ________.

A.that I couldn’t see the tree any longer    B.that I should have taken some photos

C.that I had to leave                   D.that the tree died

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与药品直接触的设备表面应光洁、平整、易清洗或消毒、耐腐蚀,不与药品发生化学变化或吸附药品。设备所用的()、冷却剂等不得对药品或容器造成污染。

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水中长期供求规划应当依据水的供求现状、国民经济和社会发展规划、流域规划、区域规划,按照水资源供需协调、()、合理开源的原则制定。

A.总量控制

B.综合平衡

C.保护生态

D.厉行节约

题型:多项选择题

计算机网络几种典型的拓扑结构中,在以下哪一个拓扑结构中有一个中心节点控制着全网的节点进行通信,任何两节点之间的通信都要通过中心节点

A.星型拓扑

B.环型拓扑

C.树型拓扑

D.总线拓扑

题型:多项选择题

iu、ui标调(以阴平为例)时,写成()。i上标调时()。

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