现在公布正确答案(可靠来源啦),此题选B(不要拍我,呵呵) A---histidine is found in all parts of the plant do not affect the argument Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Possibly, therefore, the herb’s high histidine production is what allows it to grow in metal-rich soils, B----排除other amino acids这个因素,支持原文 C----others of the closely related group of plants do not affect the argument D----想选这个答案的朋友显然自己架了个桥 原文只说renders these metals chemically inert,我们不能自己主观推测 E----irrelevent
[此贴子已经被作者于2006-10-10 22:37:37编辑过] |