用棕色试剂瓶保存AgNO3溶液，AgNO3见光分解时放出刺激性气味的气体可能是

对工料消耗量较大的项目，应尽量利用()方法制定定额。

A.经验估计法

B.统计计算法

C.技术测定法

D.经验法

To protect the environment, we are on the way. Here are a few things we can do.

Unwanted gifts? Give them away!

Have you ever received a gift that you didn’t like? Did you throw it away? If so, you can have another choice now. Two British companies hopes people will give away their unwanted gifts to them. And they will resell the gifts to raise money for the poor. In this way, the gifts can be refused and have a future life. And people can make a difference to the world.

Wear the trousers that reduce(减少) pollution!

A chemistry scientist and a fashion designer (时装设计师) have created a new kind of trousers. The trousers are made of a new material which can help reduce air pollution around us. Scientists have tested the material. The result shows that it isn’t harmful to human. This new kind of trousers may appear at the market in two years. Professor Ryan said, “If thousands of people wear the trousers, the air quality will be improved.”

Plant trees with Felix

Felix Finkbeiner, a 14-year-old German boy, is not famous as a child actor but an environment hero. At the age of 9, Felix got the idea that children could do something to protect the environment. So he started a club. Felix soon got support from children all over the world. Some of them have become his good friends. The club has an aim of planting 212 million trees. They have planted over 3.5 million trees all around the world. Felix said, “The answer to controlling global(全球的) warming is trees—lots of trees!”

小题1:The companies resell the unwanted gifts      .

A．to make the unwanted gifts useful

B．to help people learn to think carefully

C．to save money from it

D．to make money for themselves.小题2:The trousers mentioned in the passage         .

A．have been created by a physics scientist and a fashion designer

B．can help make air pollution less

C．will do harm to people

D．will be popular in two years小题3:Felix started a club          .

A．to become famous

B．to become a child actor

C．to protect the environment with other children

D．to make friends with the children around the world

甲、乙两物体，m_甲=5m_乙，甲从H高度自由落下，乙从2H高度与甲同时自由落下，在两物体落地之前，甲、乙两物体相比（　　）

A．同一时刻甲的速度大

B．同一时刻两物体的速度相同

C．各自下落1m所用的时间，甲比乙短

D．甲物体的下落加速度大

当代整体式车身上，应用超高强度钢的部件是（）。

A．中立柱

B．门槛板

C．翼子板

下面是某求助者的EPQ测验结果：

该求助者的E量表的T分为67，则说明该求助者属于( )。

A．中间型

B．倾向外向型

C．倾向内向型

D．典型外向型