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【单选题】
D-环丝氨酸在细菌肽聚糖合成过程中有抑制作用,其抑菌机理是( )。
A.
与PEP结构类似,竞争抑制PEP-UDP-N-乙酰葡萄糖胺转移酶活性。
B.
与肽聚糖单体五肽尾末端D-丙氨酰-D-丙氨酸的结构类似物,竞争抑制转肽酶活性。
C.
与D-丙氨酸-D-丙氨酸结构类似,抑制丙氨酸消旋酶和D-丙氨酸-D-丙氨酸合成酶。
D.
与细菌萜醇结合,抑制载体的再生。
E.
与N-乙酰胞壁酸五肽焦磷酸-十一异戊烯中五肽上的D-丙氨酸-D-丙氨酸末端结合,阻止肽聚糖亚单位移动到肽聚糖生长点。
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举一反三
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【多选题】在传统方法中,正确地估算投资利息需要把握( )。
A.
应计息的项目,计息期的长短
B.
计息的方式
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利率的大小,计息周期
D.
名义利率和有限利率
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【多选题】(B) A: Do you have any work experience, Lucy? B: No, ______16________ A: _______17_______ B: Eighteen. A: Are you interested in a part-time job? B: _____18______ A: We are very busy in the evening. Yo...
A.
Is it OK?
B.
I think so.
C.
What’s your plan for the job?
D.
May I know how old you are?
E.
I don’t like this job very much.
F.
That’s no problem.
G.
I’ve never done a job before.
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【单选题】--What’s your telephone number? – My telephone number is _______.
A.
zhangqing@hotmail.com
B.
0592-6273230
C.
No. 2 Hexi Street, Tianjin
D.
Hexi Nevell Company
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【单选题】Although__________before the war, the engine is still in perfect order.
A.
building
B.
to build
C.
built
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Being built
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【单选题】What’s your ______for tomorrow?
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hope
B.
schedule
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idea
D.
appointment
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【单选题】--- What’s _____ name?---____ name is Zhang Li.
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Your; My
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you; My
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your, I
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you; I
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【单选题】齿轮泵要平稳工作,齿轮啮合的重合度( )。
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必须小于1
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必须大于1
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必须等于1
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【多选题】交际应用2(共10小题,每小题2分,共20分) ( B) A : Hello, may I speak to John? B : 16 A : Hi, John! This is Li Wei speaking. B : Hi, Li Wei. What’s up? A : What are you going to do the day after tomorrow? B : 17 Do you...
A.
I think I’m busy.
B.
This is John speaking.
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I s it far from here?
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Nothing much.
F.
How can we get there?
G.
When shall we meet?
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【简答题】A: Good morning, Mr. Li. B: Good morning, Mr. Schultz. Welcome to our booth. What can I do for you? A: After studying your data, we are quite interested in (1) _______________________________, but we ...
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【多选题】在传统方法中,正确地估算投资利息需要把握( )。
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【多选题】(B) A: Do you have any work experience, Lucy? B: No, ______16________ A: _______17_______ B: Eighteen. A: Are you interested in a part-time job? B: _____18______ A: We are very busy in the evening. Yo...
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【单选题】--What’s your telephone number? – My telephone number is _______.
A.
zhangqing@hotmail.com
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0592-6273230
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Hexi Nevell Company
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【单选题】Although__________before the war, the engine is still in perfect order.
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building
B.
to build
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查看完整题目与答案
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【单选题】What’s your ______for tomorrow?
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hope
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idea
D.
appointment
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【单选题】--- What’s _____ name?---____ name is Zhang Li.
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Your; My
B.
you; My
C.
your, I
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【单选题】齿轮泵要平稳工作,齿轮啮合的重合度( )。
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必须小于1
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必须等于1
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【多选题】交际应用2(共10小题,每小题2分,共20分) ( B) A : Hello, may I speak to John? B : 16 A : Hi, John! This is Li Wei speaking. B : Hi, Li Wei. What’s up? A : What are you going to do the day after tomorrow? B : 17 Do you...
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G.
When shall we meet?
查看完整题目与答案