2019-2020学年外研版高中英语必修3创新学案: 课时跟踪练(一)
2019-2020学年外研版高中英语必修3创新学案:  课时跟踪练(一)第3页

  Coulee City, WA 99115

  (800)2330321

  5.If we want to see wild animals, we should go to________.

  A.Boundary Dam and Pend Oreille River

  B.Beacon Rock State Park

  C.Fort Casey State Park

  D.Sun Lakes State Park

  6.Which of the following is TRUE about Fort Casey State Park?

  A.Climbing is an activity in the park.

  B.It is not far away from Washington.

  C.We can go around the park by bike.

  D.There are many kinds of fun activities.

  7.In order to know more about Beacon Rock State Park, we should dial________.

  A.(800)2330321 B.(800)4525687

  C.(509)5361200 D.(800)4525689

  8.Sun Lakes State Park is different from others in that________.

  A.there are quite a lot of primitive trees

  B.a river runs through the whole park

  C.there are many standard campsites

  D.it is made up of lakes and valleys

  C

  

  Many gardeners believe that"talking"to their plants helps them grow - it turns out that they may not be crazy after all. According to the scientists from the University of Exeter, plants may keep communicating with each other through a secret "unseen" language.

  For their experiment, the scientists picked a cabbage plant that is known to send out a gas when its surface is cut. In order to get video evidence of the communication, they changed the cabbage gene by adding the protein - luciderase (虫荧光素酶), which is what makes fireflies (萤火虫) glow in the dark.

  When the changed cabbage plant was in full bloom, they cut a leaf off with a pair of scissors, and almost immediately, thanks to the luciderase, they could see the plant sending out "methyl jasmonate (茉莉酸甲酯)".

  While this was a known fact, what was surprising was the fact that the minute this gas began to give out, the nearby cabbage plants seemed to sense some kind of danger and started to send out a gas that they normally have to keep predators (捕食者) like caterpillars (毛虫) away.

What the scientists are not sure is whether the plants are trying to warn the other leaves or the