在年平均雷电日大于30天的地区，配电变压器低压侧每相装设低压避雷器的目的是降低变压器

下列表示对应化学反应的离子方程式正确的是

A．碳酸氢钠溶液中滴入氢氧化钙溶液：HCO₃^-+OH^–= CO₃^2-+ H₂O

B．向NH₄HCO₃溶液中加过量NaOH溶液并加热：NH₄⁺＋OH^－= NH₃↑＋H₂O

C．将过量二氧化硫气体入冷氨水中：SO₂＋NH₃·H₂O=HSO₃^－＋NH₄⁺

D．硅酸钠溶液与醋酸溶液混合：SiO₃^2－+2H⁺=H₂SiO₃↓

下列关于自行车上的事例中，是为了减小摩擦的是（　　）

A．脚蹬上制有凹凸的纹线

B．轮胎上制有凹凸的花纹

C．把套上制有凹凸的花纹

D．在滚动轴承中放润滑油

The purpose of the American court system is to protect the rights of the people. According to American law, if someone is accused of a crime, he or she is considered innocent until the court proves that the person is guilty. In other words, it is the responsibility of the court to prove that a person is guilty. It is not the responsibility of the person to prove that he or she is innocent.

In order to arrest a person, the police have to be reasonably sure that a crime has been committed. The police must give the suspect the reasons why they are arresting him and tell him his rights under the law. Then the police take the suspect to the police station to "book" him. "Booking" means that the name of the person and the charges against him are formally listed at the police station.

The next step is for the suspect to go before a judge. The judge decides whether the suspect should be kept in jail or released. If the suspect has no previous criminal record and the judge feels that he will return to court rather than run away — for example, because he owns a house and has a family — he can go free. Otherwise, the suspect must put up bail. At this time, too, the judge will appoint a court layer to defend the suspect if he can’t afford one.

The suspect returns to court a week or two later. A lawyer from the district attorney’s office presents a case against the suspect. This is called a hearing. The attorney may present evidence as well as witnesses. The judge at the hearing then decides whether there is enough reason to hold a trial. If the judge decides that there is sufficient evidence to call for a trial, he or she sets a date for the suspect to appear in court to formally plead guilty or not guilty.

At the trial, a jury of 12 people listens to the evidence from both attorneys and hears the testimony of the witnesses. Then the jury goes into a private room to consider the evidence and decide whether the defendant is guilty of the crime. If the jury decides that the defendant is innocent, he goes free. However, if he is convicted, the judge sets a dale for the defendant to appear in court again for sentencing. At this time, the judge tells the convicted person what his punishment will be. The judge may sentence him to prison, order him to pay a fine, or place him on probation.

The American justice system is very complex and sometimes operates slowly. However, every step is designed to protect the rights of the people. These individual rights are the basis, or foundation, of the American government.

What follows "in other words" (Para. 1)？（）

A．An example of the previous sentence.

B．A new idea about the court system.

C．An item of evidence to call for a trial.

D．A restatement of the previous sentence.

“瓦良格号”航母是我国第一艘航母，正常行驶时的功率达3×10³kW，这就是说这艘航母正常行驶时每秒做功达______．

电击伤死亡的首要原因是（）

A.呼吸抑制

B.神经损伤

C.心脏骤停

D.血管损伤

E.热烧伤