某矿物为油脂光泽,遇酸冒泡,浅黄→黄褐色,硬度较小,常产于白云鄂博霓石型矿石中,该矿物是()
A.氟碳钙铈矿
B.黄河矿
C.大青山矿
D.中华铈矿
参考答案:B
They will never forget the film they saw last Sunday, __________ ?
A.do they
B.will they
C.don’t they
D.won’t they
出现长PP间距,且长PP间距不是短PP间距的整数倍,应考虑
A.窦性停搏 B.二度Ⅱ型窦房阻滞 C.窦性心动过缓 D.病态窦房结综合征 E.二度Ⅰ型窦房阻滞