阅读理解。 |
We produce 500 billion of plastic bags in a year world-wide and they are thrown |
1.Daniel Burd won first prize at the Canada-Wide Science Fair because ____. |
A.he found a new kind of microorganism B.he contributed much to environmental protection C.he found a way to degrade plastics in shorter time D.he could encourage microbes growth in an easier way |
2.Daniel Burd exposed one plastic sample to dead bacteria to |
A.make the live bacteria work better B.test how effective his method was C.know which bacteria worked faster D.control the temperature in the process |
3.Maintaining the required temperature takes little energy because ____. |
A.plastics can get hot easily B.microbes can produce heat themselves C.much carbon dioxide is produced D.the temperature can be controlled |
4.Daniel Burd got his idea from ____. |
A.his school textbook B.the failure of researchers C.his everyday work D.the practice of other people |