题目

Scientists say there _______ now fewer than 2，000 pandas _______ in the forests. A . have, live B . have, living C . are, living 答案：C（2007?南京模拟）下图是身边一些常见物质的pH，下列说法中不正确的是（ ）A．可用醋去除皮蛋的涩味B．厨房清洁剂能使紫色石蕊试液变蓝C．草木灰可用于改良酸性土壤D．西瓜的酸性比苹果的酸性强