Climate change has caused a rise in sea levels. This has increased the amount of salt in fresh water____(use) on coastal farms. As____ result, farmers are ____(gradual) unable to use fields close to the sea.

    However, Marc Van Rijsselberg, a farmer in the Netherlands is now using a____(mix) of sea and fresh water ____(grow) healthy and tasty vegetables.

    He teamed up with scientists from the Free University and divided a farm ____eight negated areas. Separate pipes pumped fresh and sea water, and a computer program created water with eight levels of salinity（含盐度）．

    The water levels and the levels of salinity were controlled by computerized measuring devices called "sensors". Mr. Van Rijsselberg said he was able to harvest vegetables from most of the eight testing areas. He said the vegetables were smaller than ____grown in fresh water. But he said they also had more sugar and salt, so they tasted much____(good).

    He found that potatoes grew better than the other vegetables in the combination of sea and fresh water. Mr. Van Rijsselberg said four kinds of these potatoes would be sent to Pakistan____thousands of hectares of land ____(damage) by salinization (盐化作用) last year.

比3.92多0.4的数是____，比4.93少1.5的数是____。

2012年9月20日，是我国第十个“公民道德宣传日”。宣传日前夕，某校开展了评选表彰“诚实守信”道德模范活动。下列同学的行为符合诚信守则的是 (     )
①小超踢球时不小心把邻居家的玻璃打碎，他主动道歉并作出赔偿
②小新答应帮同学小婷补习功课，无论刮风下雨，他都准时前往
③考试前小光答应“传纸条”给小风，考试时小光果然这样做了
④小英因为睡懒觉而上学迟到，她却告诉老师是因为自行车坏了

生活中经常提到的“影”与我们学到的光学知识有关．在立竿见“影”和水中倒“影”中，前者是由光的____ 形成的，后者是由光的____ 形成的。