第13题: [单项选择]Often invisible, always in motion, gas is ______ of matter. A. (the state is most energetic B. ( stating the most energetic C. ( the most energetic state D. ( the state that most energetic 参考答案:C
第21题: [单项选择]Before starting a gasoline engine on a motorboat,you should make sure for safety that(). A. the gasoline tank is full B. the bilges,cabins,etc. are thoroughly ventilated C. you have fresh water on board D. Each of the above is followed 参考答案:B
第23题: [单项选择]6岁男孩,生后有哭闹后青紫。6个月后青紫渐明显,平时喜蹲踞,哭吵时有突发呼吸急促、青紫加重,严重时伴昏厥。此次因同样发作急诊住院。体检:口唇,指、趾甲青紫,杵状指、趾,胸骨左缘第2~3肋间闻及Ⅰ~Ⅳ级收缩期喷射性杂音,肺动脉瓣第二心音减弱。最可能的诊断为() A. 单纯肺动脉狭窄 B. 室间隔缺损伴重度肺动脉高压 C. 法洛四联症 D. 大动脉转位 E. 房间隔缺损伴轻度肺动脉狭窄 参考答案:C