第4题: [单项选择]There ______ some mistakes in your composition. A. have B. has C. seems to be D. seem to be 参考答案:D 答案解析:该题旨在检测考生对there be结构的掌握情况,故应排除A,B。在决定动词 seem的单复数前,要看其后紧跟的名词(即句子的主语)的单复数。mistakes为复数名词,因此,应选seem to be
第5题: [单项选择]婴儿肠套叠的三大典型表现() A. 腹痛、腹胀、呕吐 B. 腹痛、血便、呕吐 C. 腹痛、血便、腹部肿块 D. 腹痛、哭闹、腹部肿块 E. 腹痛、呕吐、腹部肿块 参考答案:C 答案解析:肠套叠多见于2岁以下儿童,临床表现有三大典型症状:腹痛、血便和腹部肿块。