[单项选择]The frequent ______ from cold to warm weather this spring have caused much illness. A. transmissions B. transactions C. transformations D. transitions
第12题: [单项选择]I couldn't understand why he pretended ______ in the book store. A. to see me not B. not to see me C. not see me D. to see not me 参考答案:B 答案解析:本题考查的是pretend一词的用法。Pretend to do为固定用法,假装做…;变否定要在不定式to do之前加上not,故选B.本句意思:我不明白为什么他在书店里假装没看见我。
第18题:[单选题]Oil water separators are used to ensure that ships do not discharge oil when bilge water,or oily water from oil tanks or any oil contaminated space. A.pumped out B.pumping out C.being pumped out D.pumps out 参考答案:B
第31题: [单项选择]肝癌的MRI成像的表现中正确的是()。 A. 肝癌MRI动态增强扫描上的典型表现与CT相似,呈“早出晚归”征象 B. 肿瘤包膜是肝癌尤其是小肝癌的重要征象,称为所谓的“环征” C. 对于弥漫型肝癌,MRI能够良好地显示出病变的范围 D. 肝癌平扫时主要表现为T1WI上的高信号 E. 早期肝癌在T1加权像常表现为低信号强度,在T2WI则多为高信号 参考答案:B