问题
填空题
抗生素的效价测定方法可分为 __________ 和 __________ 两大类。
答案
参考答案：生物学法 物理化学法
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抗生素的效价测定方法可分为 __________ 和 __________ 两大类。
参考答案：生物学法 物理化学法
| 阅读理解。 | |
| |
| 1.These rulers are made for ______. | |
[ ] | |
| A.People who will live with a family B.guides C.people who do the cleaning D.salesmen | |
| 2.Which of the following is not mentioned in the rulers? | |
[ ] | |
| A.The name of the host. B.The time to go to bed. C.Something you can't do. D.The address you will stay at. | |
| 3.The person who stays in this family ______ after 11:00 pm. | |
[ ] | |
| A.can take a shower B.can go back to the house C.should go to bed D.should shout loudly | |
| 4.You can do the following except ______. | |
[ ] | |
| A.Taking showers at 9:00 B.smoking out of the bedroom C.telling the host at 7:00 pm if you don't have dinner D.cleaning up before leaving | |
| 5.You are not allowed to ______. | |
[ ] | |
| A.answer the telephone on the owner's mobile phone B.make telephone calls to others on the owner's mobile phone C.sleep until 11:00 D.know where the bedroom is |