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【单选题】
在一个关系中,能唯一表示元组的属性的集称为关系的( )。A.
副键
B.
关键字
C.
从键
D.
参数
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举一反三
【单选题】You will hear two conversations. After each conversation, there will be some questions. After each question, there will be a short pause. The conversations and questions will be spoken only once. When...
A.
They are talking about time and money.
B.
They are talking about their traveling experiences.
C.
They are talking about their favorite scenery.
D.
They are talking about their travel plan if they were rich.
【单选题】标高分为（ ）和（ ）两种，其中建筑施工图总图的标高为（ ）。
A.
施工标高、设计标高、施工标高
B.
测量标高、设计标高、测量标高
C.
绝对标高、相对标高、绝对标高
D.
实际标高、相对标高、实际标高
【单选题】You will hear two conversations. After each conversation, there will be some questions. After each question, there will be a short pause. The conversations and questions will be spoken only once. When...
A.
Being strong。
B.
Being beautiful.
C.
National Day celebration.
D.
It's a boy's name.
【单选题】关于接待常识，下列描述错误的是（）
A.
会议主席台座次的安排，应是左为上，右为下。
B.
签字双方主人在右边，客人在主人的左边边。双方其他人数一般对等，按主客左右排列。
C.
小轿车1号座位在司机的右后边，2号座位在司机的正后边，3号座位在司机的旁边。
D.
人员排序与主席台安排相同
【简答题】In this section, you will hear two conversations. At the end of each conversation, five questions will be asked about what was said. Both the conversation and the questions will be spoken ONCE ONLY. A...
【多选题】下列关于标高描述正确的是( )。
A.
标高是用来标注建筑各部分竖向高程的一种符号
B.
标高分绝对标高和相对标高，通常以米(m)为单位
C.
建筑上一般把建筑室外地面的高程定为相对标高的基准点
D.
绝对标高以我国青岛附近黄海海平面的平均高庋为基准点
E.
零点标高可标注为±0. 000，正数标高数字一律不加正号
【简答题】Directions: Listen to conversation 1. At the end of this conversation, two or three questions will be asked about what was said. Both the conversation and the questions will be spoken only once.
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