题干
我的建议是我们应该采取有效措施保护野生生物以免它们灭绝。（suggestion, protect)
答案(点此获取答案解析）
My suggestion is that we should take effective measures to protect wildlife from dying out.
的解为x、y，且x＋y＞0，则k的取值范围是（ ）
