A. A.3), to which of the following does "it" refer Yellow "hump".B. Day.C. Sun.D. Hydrogen. 参考答案:C 答案解析:[分析] 本题考查代词指代。看原句:It is natural to as assume that as the Sun grows older,and uses up its hydrogen fu
第12题: [单项选择]患儿男,10岁。因头晕、乏力前来就诊。体检:中度贫血貌,巩膜轻度黄染,肝肋下3cm,脾肋下2cm。实验室检查如下:Hb75g/L,白细胞及血小板正常,网织红细胞12%;Coombs试验(-);红细胞渗透脆性试验:初溶为6.5g/L氯化钠溶液,全溶为4.0g/L氯化钠溶液(阳性)。下列哪种化学染色最利于该患者的诊断?() A. POX+SBB B. POX-I-AS-DNAE C. PAS+NAP D. NBE+PAS E. NBE+POX 参考答案:C
第13题: [单项选择]造成混油事故的原因是:() A. 阀门内渗,高位油罐的油品流入低位油罐 B. 管道内渗,高位油罐的油品流入低位油罐 C. 阀门外渗,高位油罐的油品流入低位油罐 D. 管道外渗,高位油罐的油品流入低位油罐 参考答案:A