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【单选题】
Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer. 听力原文：M: Miss Hanson, thank you for sending me this note. I'm sorry to hear Mary is being a problem. W: I'm not sure what's happening to Mary. She's usually an excellent student. She completes all her work and she's quiet in class. Then, last month, she just changed. Q: What can you infer from the conversation? (12)A.
The woman is the man's boss.
B.
The man is the woman's husband.
C.
The 'woman is the headmaster of a school.
D.
The woman wants to know something about a student.
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皮皮学刷刷变学霸
举一反三
【简答题】extrinsic protein
【简答题】A．肾动脉粥样硬化 B．四肢动脉粥样硬化 C．肠系膜动脉粥样硬化 D．冠状动脉粥样硬化 E．脑动脉粥样硬化 心绞痛
【简答题】A．主动脉粥样硬化 B．脑动脉粥样硬化 C．肾动脉粥样硬化 D．肠系膜动脉粥样硬化 E．四肢动脉粥样硬化 可引起消化不良，肠道张力减低，便秘和腹痛等症状
【简答题】A．肾动脉粥样硬化 B．四肢动脉粥样硬化 C．肠系膜动脉粥样硬化 D．冠状动脉粥样硬化 E．脑动脉粥样硬化 心绞痛 A． B． C． D． E．
【单选题】关于中药制剂的稳定性叙述错误的是（ ）。
A.
许多酯类药物常受H+或OH-催化水解
B.
介电常数低的溶剂将降低药物分解速度
C.
加入表面活性剂可使稳定性增加
D.
微量金属离子对自氧化反应有抗氧化作用
E.
药物的吸湿，取决其临界相对湿度(CRH)的大小
【单选题】The isoelectric point of the protein is( )
A.
The pH of the solution when the positive and negative charges on the protein are equal
B.
The pH of the solution when the pH of the protein solution is equal to 7
C.
The pH of the solution when the protein molecule is a facultative ion
D.
The pH of the solution when the protein molecule is in a positive ion state
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