无人值班变电所或变电台315KVA以下的变压器，负荷测定（）不少于一次（最大负荷时）

下列句子中加点成语使用正确的一项是

A．面对记者们咄咄逼人的追问，北约发言人先是闪烁其辞，继而哑口无言，拂袖而去。

B．社会的广泛关注，一时间使“规范化”成为学人之间炙手可热的话题。

C．洪水冲垮了李老汉的房子，全村人都很难过，村前村后，哀鸿遍野。

D．突然，一个影子如白驹过隙般一闪而过，快捷异常。

如图所示，两电阻不计的足够长光滑平行金属导轨与水平面夹角θ，导轨间距，所在平面的正方形区域abcd内存在有界匀强磁场，磁感应强度为B，方向垂直斜面向上。将甲乙两电阻阻值相同、质量均为m的相同金属杆如图放置在导轨上，甲金属杆处在磁场的上边界，甲乙相距.静止释放两金属杆的同时，在甲金属杆上施加一个沿着导轨的外力F，使甲金属杆在运动过程中始终做沿导轨向下的匀加速直线运动，加速度大小.

(1)乙金属杆刚进入磁场时，发现乙金属杆作匀速运动，则甲乙的电阻R各为多少？

(2)）以刚释放时t =0，写出从开始到甲金属杆离开磁场，外力F随时间t的变化关系，并说明F的方向。

(3)乙金属杆在磁场中运动时，乙金属杆中的电功率多少？

(4)若从开始释放到乙金属杆离开磁场，乙金属杆中 * * 生热量Q，试求此过程中外力F对甲做的功。

Section D

Directions：Read the following passage and answer the questions. Write the answers on the answer sheet.

In 1817 one of the most well-known hauntings in American history took place in the small town of Adams, Tennessee. Known as the Bell Witch, the strange activity that caused fear in the small farming community has remained unexplained for nearly 200 years. Like many stories, certain details of who or what the Bell Witch was vary from version to version. The prevailing account is that it was the ghost of a woman named Kate Batts, a mean old neighbour of John Bell. Batts believed Bell cheated her in a land purchase and on her deathbed she swore that she would haunt John Bell and his family.

News of the Bell Witch spread quickly. When word of the haunting reached Nashville, one of its most citizens, General Andrew Jackson, decided to gather a group of friends and go to Adams to investigate. The future president wanted to come face to face with the phenomenon and either expose it as a trick or send the spirit away. According to one account, Jackson and his men were traveling over a smooth section of road when suddenly the wagon stopped. The men pushed and pushed, but the wagon could not be moved. The wheels were even removed and inspected. The came the sound of a voice from the bushes saying, “I will see you tonight.” The astonished men could not find the source of the voice. The horses then unexpectedly started walking on their own and the wagon moved along again. Jackson indeed encountered the witch that night and left early the next morning, claiming he would rather fight the British than the Bell Witch！

The haunting of the Bell house continued for several years, ending with ghost’s final act of revenge. On the morning of December 19, he failed to awake at his regular time. When the family noticed he was sleeping unnaturally, they attempted to rouse him. They discovered Bell couldn’t be completely awakened. John’s son went to the medicine cupboard to get his father’s medicine and noticed it was gone but a strange small bottle was in its place. No one claimed to have replaced the medicine with the bottle. John Bell died on December 20 and “Kate” was quiet until after the funeral.

A few explanations of the Bell Witch phenomena have been offered over the years. One is that the haunting was a trick created by Richard Powell, the schoolteacher of Betsy Bell and Joshua Gardner, the boy with whom Betsy was in love. It seemed Powell was deeply in love with Betsy and would do anything to destroy her relationship with Gardner. Through a variety of tricks, and with the help of several friends, it is believed that Powell created all of the ghostly effects to scare Gardner away. In fact, Gardner eventually did break up with Betsy and left area and Powell did come out winner. In the end, he married Betsy Bell.

81.John Well’s mean old neighbor haunted them because ______.

______________________________________________________________________________

82.On Jackson’s way to investigate the ghost, the ghost ______ and later, Jackson encountered the witch and left early the next morning.

______________________________________________________________________________

83.How did the haunting eventually end？

______________________________________________________________________________

84.What was one explanation for the haunting given in the reading？

______________________________________________________________________________

常发生在肝硬化基础上的肝肿瘤是（）

A.肝炎后肝癌

B.弥漫型肝癌

C.巨块型肝癌

D.多结节型肝癌

E.肝内转移癌

控制塔、罐液位和压差变化的重要性