车辆负荷越大，轮胎对地面的压力越大，轮胎磨损越大。

Mr. George works at the school lost and found. He works very carefully. Every day, when he gets a lost thing, he takes notes about it. There are pens, books, school uniforms, keys, walkmans and many other things in the lost and found. Most of them are the students’. If you lose your things, it’s easy for you to go to the lost and found for help. But you must tell Mr. George what it is and its color and the day when you can’t find it. I think Mr. George is very helpful, and you will be happy when you find the lost there.

小题1:Who works at the school lost and found?

A．Mr. Brown

B．Mr. King

C．Mr. George

D．Nobody小题2:There are ________ things in the lost and found.

A．no

B．few

C．a few

D．many小题3:Most things Mr. George takes care of are the ________.

A．boys’

B．girls’

C．students’

D．teachers’小题4:If you lose your things, you’d better go to ask________.

A．Ben

B．Mr. George

C．your teacher

D．your parents小题5:If you lose your things and go to the lost and found for help, you needn’t tell Mr. George________.

A．What it is

B．how much it is

C．its color

D．the day when you lost it.

计算题：某PSA氢提纯装置的氢气回收率是83.25%，解吸气的含氢量为30.49%，所使用的原料气含氢量为72.36%，求产品氢气纯度是多少？

下列叙述与蝗虫的发育过程及特点不相符的是（　　）

A．蝗虫的发育属于不完全变态发育

B．幼虫与成虫外形差别不明显

C．幼虫无翅，不具备飞翔能力

D．在幼虫发育过程中有蜕皮现象

所谓绿色营销是指企业在生产经营过程中，将企业自身利益、消费者利益和环境保护利益三者统一起来，以此为中心，对产品和服务进行构思、设计、制造和销售。

根据上述定义，下列不属于绿色营销的是（）。

A．在产品设计过程中，要能满足消费者的传统需要，符合相应的技术和质量标准，也要满足对社会、自然环境和人类身心健康有利的绿色需求

B．在产品生产过程中，使用新的绿色原料、辅料，减少资源的消耗，尽可能利用再生资源，消除或减少对环境的污染，并注重控制生产成本

C．在产品营销过程中，通过试用、馈赠、竞赛、优惠等策略，引导消费兴趣，促成购买行为

D．在产品销售过程中，通过量大、面广的绿色广告，营造市场营销的绿色氛围，激发消费者的购买欲望

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