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【单选题】
欲取50mL某溶液进行滴定要求容器量取的相对误差≤0.1％，在下列量具用（ ）。A.
50 mL 滴定管
B.
50 mL 容量瓶
C.
50 mL 量筒
D.
50 mL 移液管
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皮皮学刷刷变学霸
举一反三
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B.
radical
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D.
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A.
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B.
技术与社会
C.
技术与自然
D.
技术与环境
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【单选题】Section A Directions：In this section there are 10 sentences,each with one word or phrase underlined.Choose he one from the 4 choices marked A,B,C and D that best keeps the meaning of the sentence.Then...
A.
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B.
deny
C.
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recognize
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【简答题】Section a Directions: in this section, you will hear two long conversations at the end of each comversation you will hear four questions. both the comversation and the questions will be spoken only on...
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