2. 职称英语
  3. Copper sulfate, spread in judicious amounts, kills algae does not harm fish or a

Copper sulfate, spread in judicious amounts, kills algae does not harm fish or a

游客2023-12-30  15
问题 Copper sulfate, spread in judicious amounts, kills algae does not harm fish or aquatic invertebrates.
选项 A、but does no harm
B、without harming
C、except harming
D、but not harming
答案 B
解析 句意：适量的硫酸铜可以杀死藻类，而不会伤害鱼类或水生无脊椎动物。本题可采用排除法。harm作名词时，常用结构为do harm to，而A选项中缺少to，因此排除A选项。C选项中except表示“除了”，相当于apart from，用在此处不合句意。D选项应改为but doesn’t harm。所以选项B为答案。
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