衛(wèi)生類：閱讀理解Dont Count on Dung

　　1.題目：The word "threatened" in the first sentence of the first paragraph

　　could be best replaced by

　　答案：A) "endangered".

　　2.題目：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.題目：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.題目：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.題目：All of the following are indirect evidence EXCEPT

　　答案：A) trunks.

　　速記口訣：

　　不要輕信象類

　　1.威脅就是endangered ____________________

　　2.數(shù)象不行數(shù)糞堆____________________

　　3.腐爛率導(dǎo)致不可靠____________________

　　4.普查選擇大地區(qū)____________________

　　5.直接證據(jù)是trunks ____________________