卫生类：阅读理解Dont Count on Dung
1.题目：The word "threatened" in the first sentence of the first paragraph
could be best replaced by
答案：A) "endangered".
2.题目：Why do researchers estimate elephant numbers in an area by counting
dung piles?
答案：B) Because its not possible to count elephants from a plane.
3.题目：Piles of dung cant be relied upon when it comes to estimating
elephant numbers because
答案：C) they are different in the rate of decay.
4.题目：When researchers carry out a dung ― pile census， according to
Plumptre， the area selected should be
答案：D) so large that elephants cant move in and out of it freely.
5.题目：All of the following are indirect evidence EXCEPT
答案：A) trunks.
速记口诀：
不要轻信象类
1.威胁就是endangered ____________________
2.数象不行数粪堆____________________
3.腐烂率导致不可靠____________________
4.普查选择大地区____________________
5.直接证据是trunks ____________________