1.课前作业第三周

1、以下所有内容，请计时 3 小时完成。With roughly 80,500 nonfatal gunshot injuries annually, a vast numberof Americans every year experience a verof Goddards worst day,according to the U.S. Centers for Disease Control and Prevention (CDC).“Doctors think we solved the leroblem because we took lead out ofpaand we took l

2、ead out of gas,” Goddard says. “But we still havethese very acute, very severe problems within a big population of thecountrya populationway.”ts already been victimized in a significantIn 2017, the CDC released itsreport linking lead toxicity to bulletfragments, which saideast 457 adult shooting sur

3、vivors testeditiven 2003for elevated blood lead levels from retained bullet fragments betand 2012. Its main source of data was the Adult Blood Leaddemiologyand Surveillance (ABLES) program, which requires labs and health careproviders in 41 participating ses to report blood leadlevel test results to

4、their respective health departments. The program requires ses to specifyt made itthe sourof lead exure, but many did not comply.imsible to measure the magnitude of the ie, and the true tally waslikely far highern 457, says CDCdemiologist Debora Weiss, thereports lead author.“Theres clearly sufficien

5、t researcht substantiates cause forconcern. Theres no doubt aboutt,” says Donald Smith, a professorof toxicology at the University of California, Santa Cruz, whose researchteam helped the se ban the use of lead ammunition byters. Whilestudying the effects of lead toxicity in California condors（）one

6、ofthe worlds largest birds threatened with extinctionthe researchersfound the creatures were dying in droves or being severely sickened fromleoisoning, primarily by eating the carcasses of animalsd beenshot with lead ammunition, but also by being shot with lead bulletsthemselves. “Take it from the c

7、ondors,” Smith says. “Embedded leadfrom ammunitiones significant toxic concerns.” （322 words）我看见过波澜壮阔的大海，观赏过水平如镜的西湖，却从没看见过漓江这样的水。漓江的啊，静得让你感觉不到它在流动；漓江的啊，清得可以看见的沙石；漓江的啊，绿得仿佛那是一块无瑕的翡翠。船桨激起微波，扩散出一道道水纹，才让你感觉到，船进，岸在后移。我攀登过峰峦雄伟的泰山，游览过红叶似火的香山，却从没看见过桂林这一带的山。桂林的奇啊，一座座拔地而起，各不相连，像老人，像巨象，像骆驼，奇峰罗列，形态万千；桂林的志合者，不以山海为远；天高任鸟飞，海阔凭鱼跃；一花独放不是春，百花齐放春满园。秀啊，像翠绿的屏障，像新生的竹笋，色彩明丽，倒映水中；桂林的 险啊，危