A. working out B. having been worked out C. having worked out D. to have been worked out 参考答案:B 答案解析:在现在分词的独立结构中名词或代词和现在分词在逻辑上是主谓关系,如:Nobody having any more to say,the meeting was closed.大家都没有什么可说的了,会议
第30题: [单项选择]好发于青少年的骨肿瘤除外()。 A. 尤文肉瘤 B. 软骨母细胞瘤 C. 骨肉瘤 D. 骨样骨瘤 E. 软骨肉瘤 参考答案:E 答案解析:骨肉瘤发病年龄有两个高峰,第一个高峰在青少年(在此时期,长骨的生长发育迅速),第二高峰在老年时期(此时期与Paget病和既往放疗史相关的第二原发肿瘤发病率升高有关)。软骨肉瘤多发生于中老年人,患者年龄
参考答案:are very exhausted for they have advanced forward without rest 答案解析:本句首先考查的是“疲惫”的表达方法exhausted,例句:I am exhausted! (累死我了!)它还有另一个意思是“耗尽”,例句:Your deposit is exhausted. (你的