雅思阅读真题模拟练习
本系列的模拟试题在难度、长度、题材、题型方面都与雅思考试近似的练习。这些练习,均以国外报刊上的文章为素材,按雅思阅读的题型,出题并提供答案及简单注释。欢迎大家积极使用。
Why did a promising heart drug fail?
Doomed drug highlights complications of meddling with cholesterol.
1. The failure of a high-profile cholesterol drug has thrown a spotlight on the complicated machinery that regulates cholesterol levels. But many researchers remain confident that drugs to boost levels of good cholesterol are still one of the most promising means to combat spiralling heart disease.
2. Drug company Pfizer announced on 2 December that it was cancelling all clinical trials of torcetrapib, a drug designed to raise heart-protective high-density lipoproteins . In a trial of 15000 patients, a safety board found that more people died or suffered cardiovascular problems after taking the drug plus a cholesterol-lowering statin than those in a control group who took the statin alone.
3. The news came as a kick in the teeth to many cardiologists because earlier tests in animals and people suggested it would lower rates of cardiovascular disease. There have been no red flags to my knowledge, says John Chapman, a specialist in lipoproteins and atherosclerosis at the National Institute for Health and Medical Research in Paris who has also studied torcetrapib. This cancellation came as a complete shock.
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