[单项选择]For the last hundred years the climate has been growing much warmer. This has had a number of different effects. Since the beginning of the 20th century, glaciers (冰河) have been melting very rapidly. For example, the Muir Glacier in. Alaska has retreated 2 miles in 10 years. Secondly, rising temperatures have been causing the snowline to retreat on mountains all over the world. In Peru, for example, it has risen as much as 2,700 feet in 60 years.
As a result of this, vegetation has also been changing. In Canada, the agricultural crop line has shifted 50 to 100 miles northward. In the same way cool-climate trees like birches and spruce have been dying over large areas of Eastern Canada. In Sweden the tree line has moved up the mountains by as much as 65 feet since 1930.
The passage is convincing because there are a lot of ______.
A. descriptions
B. examples
C. arguments
D. conclusions

最新试题

• ●    [单选题]两个以上生产经营单位在同一作业区域内进行生产经营活动,可能危及对方生产安全的,应当签订(
• ●    [单选题]䄠.(298482)由土壤、地下水、地下污水等所产生的电化学作用而造成的电缆腐蚀叫做(  
• ●    表现何其芳对解放区生活的体验与感受及其诗风变化的诗集是《（）》。
• ●    [简答题]摄像机上标有“REC“的红色圆点按键是表示什么功能？
• ●    [判断题]CRH1A动车组牵引电机通过轮毂齿轮与齿轮箱小齿轮轴上的齿套相连，将牵引电机生成的驱动扭矩
• ●    [单选题]不属于证券金融公司从事转融通业务的权益处理的是()。