皮皮学,免费搜题
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【单选题】
School secretary: Good morning. Can I help you? Student: Yes, I'd like to enroll for the course. School secretary: ______
A.
Thank you very much.
B.
Nice to see you here.
C.
Certainly. What's your name please?
D.
Sorry. Can I see your passport please?
拍照语音搜题,微信中搜索"皮皮学"使用
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举一反三
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A.
1
B.
2
C.
3
【单选题】微型计算机又被称为______。
A.
小型机
B.
中型机
C.
工作站
D.
个人电脑
【单选题】微型计算机按主机装置可分为台式机又称为桌上型和()。
A.
掌上电脑
B.
口袋式电脑
C.
笔记本微机
D.
便携机
【单选题】Questions 9-13 Do the following statements agree with the information given in Reading Passage 1? TRUE——if the information in the text agrees with the statement FALSE——if the information in the text c...
A.
B.
C.
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A.
CONSIGNEE: TO ORDER OF SHPPER
B.
FREIGHT: FREIGHT TO BE PREPAID
C.
PORT OF DISCHARGE: LONDON
D.
PORT OF LOADING: NANJING
【多选题】( )和( )是关系模型必须满足的完整性约束条件,并称为关系的两个不变性,应该有关系系统自动支持;( )应用领域需要遵循的约束条件,体现了具体领域的语义约束
A.
实体完整性
B.
参照完整性
C.
用户定义完整性
D.
以上都不是
【单选题】在商品表中,为了使每件商品有唯一的名称,在商品名称字段上,应该建立 约束。
A.
主键
B.
外键
C.
唯一约束条件
D.
检查约束条件
【单选题】Questions 9-13 Do the following statements agree with the information given in the text? TRUE——if the information in the text agrees with the statement FALSE——if the information in the text contradict...
A.
B.
C.
NOT GIVEN
【单选题】手动变速操纵机构中设有的锁止装置套数是
A.
1
B.
2
C.
3
D.
4
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