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【单选题】
下列数字中有三位有效数字的是()A.
溶液的pH为4.30
B.
滴定管量取溶液的体积为5.40mL
C.
分析天平称量试样的质量为5.3200g
D.
移液管移取溶液25.00ml
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【单选题】Directions: Which of the following translation is the best? 目前孔子学院已在全球数百个教育机构落户,中小学孔子课堂达 500 多个,成为推广汉语教学、传播中国文化及汉学的全球品牌和平台。
A.
So far, Confucius Institute has settled in hundreds of education institutions around the world, with Confucius Classroom in primary and middle schools amounting to more than 500, making it the global brand and platform for advocating Chinese teaching and learning, and spreading Chinese culture and sinology.
B.
s o far, Confucius Institute has settled in hundreds of education institutions around the world, with more than 500 Confucius Classroom in primary and middle schools, making it the global brand and platform for advocating Chinese teaching and learning, and spreading Chinese culture and sinology.
C.
So far, hundreds of education institutions has been settled by Confucius Institute around the world, with more than 500 Confucius Classroom in primary and middle schools, making it the global brand and platform for advocating Chinese teaching and learning, and spreading Chinese culture and sinology.
【单选题】小型乳制品生产厂检验原料乳酸度最常用的方法是（）
A.
浓度95%的酒精和牛乳等量混合
B.
浓度80%的酒精和牛乳等量混合
C.
浓度68%的酒精和牛乳等量混合
D.
浓度50%的酒精和牛乳等量混合
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