根据我国法律的规定，设立外商投资企业，外方投资者以外币缴付出资，应当按照一定的标准折

二亿零四万五千写作______，省略万后面的尾数是______万．

Scientists from South Korea are trying to convert（转化）sound waves into electricity. The research could lead to charging a cell phone from a conversation or providing energy to the nation’s electricity system generated（产生）by the noise during rash-hour traffic.

“Just as speakers transform electrical signals into sound, the opposite process —turning sound into a source of electrical power — is possible,” said Young Jun Park and Sang-Woo Kim, the joint authors of a new article in the journal Advanced Materials.

Harvesting energy from phone calls and passing cars is based on materials known as piezoelectrics. When bent, piezoelectric materials turn that mechanical energy into electricity. Lots of materials are piezoelectric: cane sugar, quartz （石英）and even dried bone which could create an electrical charge when stressed. For decades, scientists have pumped electricity into piezoelectric materials for use in environmental sensors, speakers and other devices.

Over the past few years, however, scientists have made dramatic advances in getting electricity out of piezoelectric devices. In an experiment, by using sound waves, which at 100 decibels（分贝）were not quite as loud as a rock concert （a normal conversation is about 60-70 decibels）, the South Korean scientists produced a mild electrical current of about 50 millivolts（毫伏）. The average cell phone requires a few volts to function, several times the power this technology can currently produce.

“But the real question is whether there is enough surrounding noise to act as a power source as for a cell phone,” said McAlpine, a leading scientist. A consumer probably wouldn’t want to attend a rock concert or stand next to a passing train to charge his cell phone. The South Korean scientists agree but they expect to get a higher power output as they continue their work.

小题1:According to the two South Korean scientists, ________.

A．sound waves can travel faster than electricity

B．new materials can send cell phone signals better

C．using cell phones adds to heavy traffic in rush hour

D．electricity and sound can be transformed into each other小题2:We know from the passage that piezoelectric materials ________.

A．can produce electricity when stressed

B．are good at changing electricity into sound

C．can reduce the noise of passing cars

D．have been widely used in phones and cars小题3:It can be inferred from the South Korean scientists’ experiment that ________.

A．it is hard to change sound into electricity under current conditions

B．it is impossible to make use of loud sound

C．the technology has a long way to go to have a practical use

D．the technology can power cell phones easily小题4:What McAlpine doubts about the technology is ________.

A．the noise pollution

B．the sound resource

C．the cost of piezoelectrics

D．the safety of devices

综合性学习。（7分）

今年的烟花三月，扬州城好事连连。请阅读下面的材料，回答问题。

材料一：每年农历三月，是古城扬州最为秀美的时节。而每年这个时候，由于四面八方的游客纷至沓来，“紧凑”的扬州城车多人挤，瘦西湖、个园等核心景点周边更是车位难求，车辆蜗行，人满为患。今年烟花三月，倡导“慢生活”的扬州城有了一个明显变化，市区“多”出了十多个公共自行车租赁点，每个租赁点一溜边停放着时尚、轻便的崭新自行车，扬州人用自己的方式邀请市民和游客“骑车玩”。记者了解到，近一段时间内，共有5000辆公共自行车陆续亮相街头，闹市区、景点边交通拥堵的状况将得到明显改观。和外地的公共自行车相比，扬州的公共自行车除了“站点”多、数量多，车轮无胎，不须充气，不会爆胎；还首次用上了密码锁，代替了过去的钥匙锁。目前在扬州投入使用的公共自行车，是最新的一代。

材料二：4月20日上午，第九届鉴真国际半程马拉松赛在我市举行。下面是本赛事的会徽。

小题1:阅读材料一，用简洁的语言概括材料一的主要内容。（2分）

小题2:仔细阅读材料二，用简洁、生动的语言介绍主体图画部分的寓意。（3分）

小题3:请你为第九届“鉴真国际半程马拉松赛”拟写一条宣传标语。（2分）

耳朵是人体的重要器官，保护耳朵是从小注意的大事，要保护耳朵，我们先得知道耳朵害怕什么？然后找到解决的好办法。

一怕：                    办法：                                  二怕：                     办法：                                      三怕：                     办法：                                  四怕：                     办法：                                      

军车的“三证一单”不包括（）

A、士兵证

B、军车行驶证

C、身份证

D、派车单