题干

澳大利亚有憨实可爱的考拉、善于游泳的鸭嘴兽…澳大利亚至今保存着这些古老的动物,其主要原因是(  )

A:常年冰雪覆盖

B:长期孤立在南半球的海洋上,自然环境单一

C:澳大利亚大盆地有丰富的地下水

D:气候炎热干燥,有大面积的沙漠和草地

上一题 下一题 0.0难度 选择题 更新时间:2016-05-31 11:14:24

答案(点此获取答案解析)

B

同类题2

     I sat with my friend in a well-known coffee shop in a town of Italy.

  As we enjoyed our coffee, a man entered and sat beside us. He called the waiter over, saying, ”Two cups of coffee, one of them there on the1

    We heard his order with2 and noticed that he was served one cup of coffee 3he paid for two.

    When he left, the waiter put a piece of paper on the wall saying "A Cup of Coffee".

    While we were still there, two other men entered and 4three cups of coffee , two on the table and one on the wall. They had two but paid for 5 .  This time also, the waiter did the same thing.  It was  6  unusual for us.

    After a few days, we had a chance to enter this coffee shop again. While we were enjoying our coffee, a man  7  appeared homeless entered. He looked at the wall and said, "One cup of coffee from the wall."

    The waiter served a cup of coffee to this man with 8 The man had his coffee and left without    9  . We were amazed to watch all of this as the waiter   10 a piece of paper off the wall and threw it into the bin.

    Now it was no surprise for us---the matter was very 11  . The people of this town showed great respect for those people who needed help.

    Just think about   12this man wanted. He didn't have to lose his face to ask for a(n) 13  cup of coffee.   14 asking or knowing who was giving him this cup of coffee, he only looked at the wall, placed an order,  15 his coffee and left.

    It's a truly beautiful thing---probably the most beautiful wall anywhere in the world.