问题
单项选择题
下列关于种群密度调查的叙述错误的是（）
A.用样方法调查植物种群密度时，取样的关键是做到随机取样
B.样方法常用的取样方法有五点取样法和等距取样法
C.样方法调查种群密度是以所有样方种群密度的平均值作为种群密度的估算值
D.动物的种群密度只能用标志重捕法进行调查
答案
参考答案：D
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下列关于种群密度调查的叙述错误的是（）
A.用样方法调查植物种群密度时，取样的关键是做到随机取样
B.样方法常用的取样方法有五点取样法和等距取样法
C.样方法调查种群密度是以所有样方种群密度的平均值作为种群密度的估算值
D.动物的种群密度只能用标志重捕法进行调查
参考答案：D
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| Hawaii is famous for its beautiful beaches. Every year water sports, especially surfing and water skiing attract 1 tourists to the island. Hawaii has been a magical name to people who like to travel 2 many years. People on 3 side of the Pacific Ocean (太平洋), in Japan and in America, dream of 4 these beautiful islands in the middle of the ocean. In the tropical (热带的) lands, the sun drops like a ball of golden fire into the sea, and it drops so 5 that you can almost see it move.The sun leaves behind a glow (落日余辉) that lights the sky in the quiet water. People often have a quiet, enjoyable time walking along the water. This scenery is not very different from the exciting beauty that greeted the first tourists to these islands centuries ago. They came in canoes not much 6 than small boats. They found the beautiful white sand beaches and the waving palm trees (棕榈树), but there were no grand hotels like 7 we see today. The first people came to Hawaii nearly 8 years ago, but skyscraper (摩天大楼) hotels were only built in the last 25 years. Now aeroplanes make it possible to fly to Hawaii for a weekend from Tokyo 9 San Francisco. 10 people come from, they really want to see the earliest beauty of Hawaii. They want to see the lovely beaches and the mountains which are almost hidden by the tall hotels. | ||||
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