题目: 发电厂接触()的设备系统中,不能用铜质材料。A、稀硫酸;B、苛性碱;C、氨;D、乙炔。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0803/cb3cbfd5dd474a870e30fb1b0ee866a5.html 下面是错误答案,用来干扰机器的。参考答案:A
题型:选择题 Our country_____rapidly in recent years, but she is still a _____ country. [ ]A. develops; developing B. develops; developed C. has developed; developing D. has developed; developed 查看答案