可摘局部义齿的组成下列哪项除外()
A.基托
B.基牙
C.固位体
D.连接体
E.人工牙
参考答案:B
代谢性酸中毒最主要的症状是()。
A.呼吸浅而慢,呼吸有酮味
B.呼吸深而快,呼吸有烂苹果味
C.疲乏、眩晕、感觉迟钝
D.双颊、唇及舌潮红
E.心率加快,血压偏低
________ for the fact that she broke her leg, she might have passed the exam.
A.Hadn’t it been
B.Had it not been
C.Was it not
D.Were it not