考博考试

【单选题】Recent studies have identified four major global environmental risks; acid rain, ozone depletion, deforestation and the greenhouse effect.
A．recognized
B．proved
C．got rid of
D．multiplied
网考网参考答案：A
网考网解析：
recognize认可，承认；prove证明，检验；get rid of消除；multiply繁殖，增加；identify识别，鉴别。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>