考博考试

【单选题】According to the passage, which of the following is NOT the cause of dropping temperatures
A. Volcanic eruptions
B．Mountain torrents
C. Crop and livestock production
D．The floods after the storm
网考网参考答案：C
网考网解析：
选项C是气温下降的结果，而不是原因。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>