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属于β-内酰胺类抗生素的药物有
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下列对于青霉素素的说法错误的是
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青霉素类抗生素的特点是
(Directions:) Choose a suitable word from the given pairs to complete the following sentences and try to figure out the difference in meaning.Group 1. want/wish1. I ________ you both a very pleasant journey.2. Ann, I am sorry. I ________ I had never said that to you.3. My parents ________ me to give you their best regards.4. We do not ________ to waste our money on such worthless things.Group2. skin/hide5. This is the best lotion I’ve ever known for ________ care.6.“I’m sorry I called you a pig.” “My ________ is thick enough; it didn’t bother me.”7. This pair of boots is made of buffalo ________. They are very durable.8. I don’t need a knife; I can peel the ________ off with my fingers.Group3. raise/rear9. The male bird helps the female to ________ the young.10. You cannot ________ corn here. The climate is not right for it.11. The couple agreed that to ________ the children properly they need two incomes.12. He worked hard to ________ himself from poverty.Group4. royal/kingly/sovereign13. The British ________ family has been the focus of media attention in recent weeks.14. The young man’s ________ bearing (仪态) has won him many admirers.15. When did India gain its independence and become a ________ state?16. With his health restored, he is now ready to resume his ________ duties.
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