第17题: [单项选择]—What do you think made Betty so upset —______her new bicycle.
A. As she lost B. Because of losing C. Losing D. Lost 参考答案:C 答案解析:考查句子结构。因为答案表达的是what的具体内容,而what在问句中作宾语从句的主语,也就是说这句话的完整句为:I think losing her new bicycle made Lucy so
第20题: [单项选择]下列哪项不是肺动脉高压的X线表现( ) A. 右下肺动脉干扩张 B. 其横径≥15mm C. 肺动脉段明显突出和其高度≥7mm D. 右心房扩大 E. 右心室肥大 参考答案:D 答案解析:[解析] 肺动脉高压的X线表现包括:右下肺动脉干扩张,其横径≥15mm;肺动脉段明显突出或其高度≥7mm;右心室肥大。