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【单选题】
喹诺酮类药物的抗菌作用机理是( )A.
抑制二氢叶酸还原酶,使DNA合成酶受阻
B.
抑制DNA回旋酶,抑制DNA合成
C.
直接破坏DNA结构,导致菌体死亡
D.
抑制菌体蛋白制合成
E.
破坏菌体细胞膜的结构,使菌体内重要物质外漏
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皮皮学刷刷变学霸
举一反三
【单选题】_______, she is quite modest.
A.
As she is an experienced teacher
B.
An experienced teacher as she is
C.
Experienced teacher as she is
D.
Experienced teacher although she is
【单选题】_________yesterday, did we receive your L/C. ( ) A. Until B. Not until C. Until not D. No until
A.
Until
B.
Not until
C.
Until not
D.
No until
【单选题】He is an tourist and he has interesting experiences.
A.
experienced; a great many of
B.
experienced; a great deal of
C.
experiential; a great deal of
D.
experienced; a great many
【单选题】It was ______ last week ______ I knew the news. ( )
A.
until…that
B.
not until…when
C.
not until…that
D.
until…since
【单选题】I arrive at nine o'clock, teach until twelve thirty and then have a meal that is my morning ______ .
A.
habit
B.
custom
C.
practice
D.
routine
【单选题】He is an teacher, for every he did is very successful.
A.
experienced; experience
B.
experienced; experiments
C.
experimental; experiment
D.
experienced; experiment
【单选题】Mary is______ than Alice.
A.
more experienced a teacher
B.
a more experienced teacher
C.
more an experienced teacher
D.
more experienced teacher
【单选题】Andrew is ______ than his students.
A.
more an experienced teacher
B.
a more experienced teacher
C.
an experienced more teacher
D.
a teacher more experienced
【单选题】____ that he went to sleep. [ ]
A.
It was until midnight
B.
That was until midnight
C.
It was not until midnight
D.
That was not until midnight
【单选题】I ____go to sleep ____11 o’clock yesterday.
A.
don’t; until
B.
doesn’t ;until
C.
don’t until
D.
didn’t ;until
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