酸雨、臭氧层被破坏、温室效应和土地荒漠化是当今面临的严重环境问题．说法不正确的是（ ） A．冰箱中使用含氟制冷剂，会破坏臭氧层 B．大量使
After the landslide, the survivors went outwhat had been left. A. to search B. in search for C. in search of D. in the search of
According to the art dealer, the painting ______ to go for at least a million dollars.A. is expected B. expects C. expected D. is expecting
在钢中添加一定比例的铬（Cr）和镍（Ni）可以得到不锈钢，其中镍的原子序数为28。下列说法不正确的是A．不锈钢是一种合金，因此不属于金属材料B．
－－Hey,look where you are going? －－Oh,I'm terribly sorry.＿＿＿＿＿． A. I'm not noticing B.I wasn't noticing C. I haven't noticing D.I don't noticing
Guide for Teenagers The teenage years can be tough, and it’s normal to feel sad every now and then. But if these feelings don’t go away or become so intense that you can’t handle them, you ma
Mr. White turned the land behind his house into a chicken farm, which would____have been deserted. A. therefore B. however C. otherwise D. anyhow
如图所示，点P到直线l的距离是( ) A．线段PA的长度 B．线段PB的长度 C．线段PC的长度 D．线段PD的长度
