问题 选择题

现有等质量甲、乙、丙三种金属,分别放入三份溶质质量分数相同的足量稀硫酸中,产生氢气的质量与反应时间的关系如下图所示(已知甲、乙、丙在生成物中化合价均为+2价)。则下列说法中不正确的是

 
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A.生成氢气的质量:甲﹥乙﹥丙  

B.相对原子质量:乙﹥丙﹥甲                        

C.金属活动性:乙﹥甲﹥丙      

D.消耗硫酸的质量:甲﹥乙﹥丙

答案

答案:B

阅读理解

阅读理解。

     From school to band Practice, the Venturi Eclectic is an Earth-friendly way to get where you want

to go. This battery-powered, zero-emission (meaning it doesn't pollute the air) vehicle runs mainly on

renewable energy. Solar panels on the Eclectic's roof absorb sun rays when you're driving. On windy

days, you can connect a machine to the car's roof that collects energy from the wind while you're parked.

The Eclectic's top speed is 28 miles an hour; the battery lasts for 31 miles before it needs to be recharged.

Zipping (迅速行进) around the neighborhood has never been better.

     Here's an eco-friendly way to tell time: Simply fill the Bedol Water-powered Clock's tank (箱) with

water, add some lemon juice, and the clock will display the time without the need for environmentally harmful

batteries. There are two sets of metal electrodes (电极) inside the water tank. Water contains ions (离子)

that carry negative and positive charges. These ions complete a charge between the electrodes, creating

enough energy to power the clock. Just refill the tank every few weeks, and this clock will keep on ticking.

     Bloodhound SuperSonic Car (SSC) will be the first car to attempt to break the l,000-mile-an-hour barrier.

(The current record is 763 miles an hour.) A concept for now, the rocket-shaped car gets its original push

to 350 miles an hour from a jet engine. Then a rocket fires up, pushing the SSC past 1,000 miles an hour.

In order to keep the car streamlined (流线型的), the driver lies back at a 45-degree angle (角度).

     You're having a blast at your friend's birthday party. But when it's time to bring out the cake, everyone

crowds around, blocking your view. No worries. Throw the Triops into the air, and this clever camera

captures the view from above. The Triops can take three pictures at once, each from different angles. You

can also record sounds and command the Triops to start shooting whenever it hears that noise. That's one

smart camera.

                                                           

1. What is the common characteristic of the Venturi Eclectic and the Bedol Water-powered Clock?

A. They don't need batteries.

B. They are difficult to operate.

C. They can be powered by water.

D. They are environmentally friendly.

2. According to the passage, the Venturi Eclectic _____.

A. is popular with businessmen

B. is suitable for a long trip

C. can turn wind into energy

D. has only a little gas emission

3. The underlined phrase "having a blast" in the last paragraph probably means _____. 

A. looking at a picture

B. enjoying yourself

C. blowing out a candle

D. recording sounds

4. Which of the following is TRUE according to the passage?

A. The Triops is sensitive to sounds.

B. The driver of the SSC must be of great size.

C. The color of the Bedol Water-powered Clock is like that of lemon.

D. The SSC doesn't have anything to do with a rocket actually.

判断题