问题
单项选择题 A1/A2型题
培养基的pH过低时，其抑菌圈可扩大的是（）
A.米诺环素
B.庆大霉素
C.红霉素
D.诺氟沙星
E.头孢菌素
答案
参考答案：A
解析：本题要点为纸片扩散法的培养基要求，其pH值为7.2～7.4，过高或过低的pH值会影响药物效能。碱性可扩大氨基糖苷类药物的抑菌圈，酸性可扩大四环素类药物的抑菌圈，米诺环素为四环素类抗菌药物。
搜题请搜索小程序“爱下问搜题”
培养基的pH过低时，其抑菌圈可扩大的是（）
A.米诺环素
B.庆大霉素
C.红霉素
D.诺氟沙星
E.头孢菌素
参考答案：A
解析：本题要点为纸片扩散法的培养基要求，其pH值为7.2～7.4，过高或过低的pH值会影响药物效能。碱性可扩大氨基糖苷类药物的抑菌圈，酸性可扩大四环素类药物的抑菌圈，米诺环素为四环素类抗菌药物。
Happy Time Park
小题1:The park is in the ______ of the city. A. north B. east C. west 小题2: You can take a ______ bus to get to the park. A.No.16 B.No.6 C.No.4 小题3: There is ______ in the park. A. a zoo B. a cinema C. a plant garden 小题4:If you visit the park on Wednesday, you must leave the park ______. A. before six o’clock in the afternoon B. between 16:00 and 18:00 C. before four o’clock in the afternoon 小题5:Which of the following is TRUE according to the advertisement? A. You can do sports in the park except swimming. B. If you feel ill or get hurt in the park, you can find doctors for help there. C. You can have a barbecue in the park if you buy something in the shopping centre. |