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【单选题】
关于抗生素杀菌的机制,错误的是A.
青霉素通过产生 β- 内酰胺酶,破坏已合成的细菌细胞壁
B.
链霉素通过作用于细菌核糖体 30S 亚基,抑制菌体蛋白合成
C.
红霉素通过作用于细菌核糖体 50S 亚基,抑制菌体蛋白合成
D.
喹诺酮类药物通过作用于 DNA 旋转酶,干扰细菌核酸复制
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【简答题】虽然保暖性是与 密切相关的,但是户外运动不允许服装 ,因此既要保暖又要 才符合户外 的特殊要求。
【简答题】阅读下面短文，掌握其大意，然后从26—45各题所给的四个选项中，选出一个最佳答案（每空1分，共20分）。 When I walked into the living-room, my 12-year-old son looked 26 at me and said “I love you”. I didn’t know what to say. 27 several seconds I stood...
【单选题】【 2015· 湖南】 28.He must have sensed that I ________ him. He suddenly glanced at me and said quietly, "Why are you staring at me like that?"
A.
would look at
B.
looked at
C.
was looking at
D.
am looking at
【简答题】完型填空 （共20小题，每小题1分，满分20分） I was tired and hungry after a long day of work. When I walked into the living room, my 12-year-old son looked __26__ at me and said, “I love you.” I didn’t know what to say. ...
【单选题】She _____ the teacher carefully, but didn't _____ anything. [ ]
A.
listens to, hear
B.
listened to, hear
C.
hears, listened to
【单选题】Don't turn off the radio. I ________ to the news. [ ]
A.
listen
B.
have listened
C.
listened
D.
am listening
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