第8题: [填空题]What is unique about camels
The camel is an animal that can survive many days ______. 参考答案:without food or drink 答案解析:[听力原文]11-15
How long could you live without food or water One or two days maybe The camel is a
第9题: [单项选择]PHP在钻井液中起()。 A. 分散作用 B. 絮凝作用 C. 调节pH值 D. 都不是 参考答案:B