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【单选题】
下列关于维生素K类维生素的叙述正确的是()。
A.
为一类具有凝血作用的维生素
B.
维生素K1~K4均属于萘胺类衍生物
C.
维生素K5~K7均属于2-甲基-1,4-萘醌类衍生物
D.
维生素K1为白色结晶有吸湿性
E.
维生素K3为黄色至橙色透明的粘稠液体
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【判断题】V形密封圈是利用压环压紧密封环时,支承环使密封环变形而起密封作用的,所以使用时必须三个环联用。
A.
正确
B.
错误
【多选题】下列关于法律的含义表述正确的是(  )。
A.
法律是由国家创制和实施的行为规范
B.
法律由一定的社会物质生活条件所决定
C.
法律是统治阶级意志的体现
D.
法律是被统治阶级意志的体现
【单选题】In which phase of the software engineering process is the Software Requirements Specification developed?(68).
A.
development phase
B.
engineering phase
C.
maintenance phase
D.
Definition phase
【判断题】用锻件大平底调灵敏度时,如底面有污物将会使底波下降,这样调节的灵敏度将偏低,缺陷定量将会偏小。
A.
正确
B.
错误
【单选题】听力原文:W: Excuse me, can you tell me how to get to the zoo? M: You can take a No. 111 Bus. W: Where shall I get off the bus? M: At the railway station. The zoo is to the east of it. It's not very far, y...
A.
It lies to the east of the city.
B.
It lies to the east of the zoo.
C.
It lies to the West of the zoo.
【单选题】Which phase of the software engineering process results in the Software Requirements Specification?(  )
A.
definition phase    
B.
engineering phase
C.
maintenance phase
D.
development phase
【单选题】听力原文:W: Excuse me, can you tell me where the Staff's Association is meeting? M: It was going to meet in Room 110, but was changed to the auditorium for more space. Where is the Association meeting?
A.
In Room 110.
B.
In the meeting room.
C.
In the auditorium.
D.
In the staff room.
【判断题】证券具有两个最基本的特征:一是权利特征;二是书面特征。
A.
正确
B.
错误
【单选题】听力原文:M: Excuse me, can you tell me the gate for the flight to Paris? W: Do you have the flight number? Q: Where does the conversation happen? (5)
A.
At a post office.
B.
In a classroom.
C.
At an airport.
D.
At a bank.
【单选题】在质谱图中,被称为基峰的是( )。
A.
质荷比最大的峰
B.
强度最小的离子峰
C.
一定是分子离子峰
D.
一定是奇电子离子峰
E.
相对强度最大的离子峰
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