乳牙根管充填材料常选用
A.氢氧化钙制剂B.氧化锌丁香油糊剂+牙胶尖C.氢氧化钙制剂+牙胶尖D.氢氧化钙制剂+银尖E.氧化锌丁香油糊剂+银尖
参考答案:A
在比例尺为1:500的地图上,2厘米代表实际距离1000米.______.
She searched all the places where she _____ have left her necklace but it was all in vain.
A.might
B.would
C.could
D.should