第20题: [单项选择]软胶囊囊壁由明胶、增塑剂、水三者构成,其重量比例通常是() A. 1:(0.2~0.4):(1~1.6) B. 1:(0.2~0.4):(2~2.6) C. 1:(0.4~0.6):(1~1.6) D. 1:(0.4~0.6):(2~2.6) E. 1:(0.4~0.6):(3~3.6) 参考答案:C
第28题: [单项选择]It is politely requested by the hotel management that radios ______ after 11 o' clock at night. A. were not played B. not to play C. not be played D. did not play 参考答案:C 答案解析:[考点] 谓语动词。
[解析] 本题测试虚拟语气。题句中动词request所接从句要用虚拟语气:其结构为should+动词原形,should可省略。C项为be+过去分词形式,故正确。要求用虚拟语气的
第29题: [单项选择]流脑细菌学检查方法中,阳性率最高的是() A. 皮肤瘀点涂片革兰染色 B. 脑脊液沉渣涂片革兰染色 C. 脑脊液培养 D. 血培养 E. 周围血白细胞革兰染色 参考答案:A