pH-速度曲线图最低点所对应的横坐标，即为。A、最不稳定pHB、反应最高点C、pH催化点D、最稳定pH

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高等继续教育 / 药剂学

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pH-速度曲线图最低点所对应的横坐标，即为。
A、最不稳定pH
B、反应最高点
C、pH催化点
D、最稳定pH

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药剂学

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2[阅读题] Passage 1 Learning the language of a country isn't enough. If you know the manners of your foreign friends, you will probably be surprised just how different they can be from your own. A visitor to India should remember it is impolite there to use the left hand for passing food at the table. The left hand is for washing yourself. Also in India, you might see a man shaking his head at another to show that he is disagreeing. But in many parts of India a side-to-side movement of the head is to show agreement. In Bulgaria you shake your head to show "yes"—a nod shows "no". In Europe it is quite usual to cross your legs while sitting and talking to someone, even at an important meeting. But doing this could cause offence to a Thailander. Touching the head of a grown-up is also not done in Thailand. Knowing about manners is useful when you are traveling, and you also need to know the language used to express the customs. 1． If you are staying in India, you'd better . 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You know that TV show you’ve been dying to see, or that game of chess you’ve been waiting all week to challenge your friend to. These and many other special activities can be used for motivation. Promise yourself that you’ll force yourself to work efficiently. (Don’t rush through the assignment, though.) 　　5. Take a nap. Sometimes even a 20-minute nap in the afternoon will give you the extra energy you need to get through the day. 1. We need to play ahead in order to ________. A. keep a record of all the events B. better organize our activities C. store everything in our head D. pile up little tasks neatly 2. Strategic times are best for us to ________. A. save energy B. check e-mails C. study efficiently D. organize activities 3. Which of the following could be used as a motivation to do our assignments? A. Remembering our urgent tasks. B. Any activities we’re eager to do. C. Taking a break in the afternoon. D. The promise to study efficiently. 4. 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