波斯王国建立于公元前6世纪，王国的创立者是阿黑门尼德族人（）A、大流士 B、居鲁士

在改写后的句子中填入适当的词（每空一词），使之与原句意思相同或相近。请将答案填写在答题纸相应的栏目内。

小题1:Jack had been playing around me, but now I couldn’t see him anywhere.

Jack had been playing around me, but now he was（1）_______ to （2）_______ （3）_______.

小题2:Look at the clock! It’s possible that he will be late for the train.

Look at the clock! He(4）_______（5）_______（6）_______ be late for the train.

小题3:They each have made great contributions to the environmental protection.

Each of them （7）_______ （8）_______ greatly（9）_______ the environmental protection.

小题4:The group of eight which is made up of eight richest countries in the world is really powerful.

The group of eight（10)_______  (11)________ eight richest countries in the world is really powerful.

小题5:It was several minutes before I realized what was going on.

It was several minutes before I was (12)_______  (13)_______  what was (14)________.

小题6:Not everything that is best for nature is good for people.

(15)________ that is best for nature (16)_______  (17)________ good for people.

小题7:This table is three times as big as that one.

This table is three times (18)________ (19)_________ (20)________ that one.

下面是某地鞋业生产出现的三种情况：①某鞋厂劳动生产率率先提高，该行业劳动生产率不变；②制鞋行业劳动生产率普遍提高，某鞋厂劳动生产率不变；③某鞋厂与本行业劳动生产率同步提高。在上述三种情况下，该鞋厂生产的每双鞋的价值量依次产生的变化是  [ ]

A．提高、不变、降低　　

B．降低、提高、不变

C．不变、不变、提高　　

D．不变、降低、降低

甲公司出口货物15公吨，500箱装，每箱毛重40公斤，体积20厘米×30厘米×40厘米，单价CFR LONDON每箱60.00美元。查运费表得知该货为8级，计费标准为W/M，每运费吨运费为100美元，另征收转船附加费20%、燃油附加费10%。该货物的出口总成本为20万元人民币。外汇牌价为100美元/7.76元人民币。则出口盈亏率是多少

下列叙述不能体现相关主旨的是

A．“水域蓝天，拒绝污染”一严控PM 2.5排放，改善雾霾天气

B．“化学，让生活更美好”一积极开发风力发电，让能源更清洁

C．“节能减排，低碳经济”一综合利用煤和石油，发展绿色化学

D．“化学，引领科技进步”一研究合成光纤技术，让通讯更快捷

试用简练的语言说明导热、对流换热及辐射换热三种热传递方式之间的联系和区别。