使用铁锨、铁镐时,应与他人保持一定的安全距离。锨把、镐把应安装牢固,有()的把柄不得使用。
A.劈裂
B.污渍
C.标记
D.折断
参考答案:A, D
Today I’d like to talk about how to become a (1) . Usually you have to start at the beginning. That is, you have to begin (2) of some sort on a local newspaper, a (3) , maybe on a small magazine -- work (4) . Now there aren’t that many organizations which have large numbers of foreign correspondents so you also have to (5) with that aim (6) . Another way of doing it is to work abroad, and work as (7) . That’s somebody who sells stories, and gets paid (8) , to newspapers and magazines and so on. And hoping to (9) that way, and eventually to be offered a (10) .I don’t really know (11) are needed, but obviously a degree in modern languages or (12) would be very useful. But, a degree in itself probably wouldn’t (13) . It wouldn’t be enough to get you job. It wouldn’t (14) to make an editor decide to (15) . So it’s difficult to define the (16) . You’re going to need (17) and the ability to assimilate information (18) and then produce stories which (19) of the newspaper or radio or television station you (20) .
光伏发电是利用半导体界面的光生伏特效应而将光能直接转变为电能的一种技术,其关键元件是太 阳能电池, 其 产业链的产品具有轻、薄、短、小的特点。读图完成下列各题。
小题1:下列关于世界太阳能光伏发电现状的分析,正确的是
A.发电量 发达国家远超发展中国家是因为区域内太阳能资源比较丰富
B.近年来 太阳能光伏发电增长迅速是因为 太阳 能发电成本较矿物能低
C.发达国家大力发展 太阳能光伏发电 可以 有效减轻碳排放的减排压力
D.发达国家大力发展 太阳能光伏发电 可以 根本上解决能源短缺的问题小题2:根据太阳能光伏产业链的特点,目前,我国下列省区中最适宜布局太阳能光伏设备产业基地的是
A.青海
B.江苏
C.新疆
D.贵州小题3:太阳能光伏发电的缺点之一是受季节变化的限制,下面四幅是 某校(约 30°N)学生在不同季节升旗 仪式时(北京时间 7:30)观测 到 的太阳方位示意 图 ,图示所代表的季节最有利于太阳能光伏发电的是