更多"[单选题]—We want to sit at the table n"的相关试题:
[单选题] We want to go to Japan to have a _____ study.
A. farther
B. farthest
C. further
D. furthest
[单选题]People sit uncomfortably on plastic chairs, _______ through old magazines, all of _______ have been read hundreds of times previously.
A.look; that
B.looking; which
C.looking; whom
D.looking; that
[判断题]翼上出口撤离口令为：“坐！滑，Sit slide！”
A.正确
B.错误
[单选题]If we travel abroad, we prefer to stay in five-star hotels. That’s because they can ______ guests with the best service.
A.preview
B.provide
C.prevent
D.design
[单选题] We often __( )_ the happy time we spent at your home last summer.
A. recall
B. remind
C. present
D. provide
[单选题]Although we are of the same age, we _( )_ in height and weight (体重).
A. vary
B. various
C. different
D. very
[单选题] If we _____ the earlier bus, we might have arrived here on time yesterday.
A. took
B. would take
C. had taken
D. take
[单选题] _____ we have enough money, we won’t buy any useless things.
A. Since
B. Until
C. Because
D. Although
[单选题] We often _________ the happy time we spent at your home last summer.
A. recall
B. remind
C. present
D. provide
[单选题] The underlined expression "wait on table" in Para 2 means "__________________".
A. work in a furniture shop
B. keep accounts for a bar
C. wait to lay the table
D. serve customers in a restaurant
[单选题]CREATE TABLE products ("
product_no integer,
name text,
price numeric CHECK (price > 0) DEFAULT 0
);
执行以上语句会？
A.建表成功，但插入数据时price列不能使用默认值
B.建表成功，插入数据时price列可以使用默认值
C.建表失败，提示默认值违反了约束条件
D.建表失败，提示语法错误
[单选题]We ________ 1000 English words since we ________ to this school.
A.learn, come
B.have learning, came
C.have been learning, come
D.have learned, came
[多选题]CREATE TABLE products (
order_id integer PRIMARY KEY,
product_no integer REFERENCES products (product_no),
name text NOT NULL,
price numeric CHECK (price > 0),
discounted_price numeric CHECK (discounted_price > 0),
CHECK (price > discounted_price)
);
上面语句中有几种约束？
A.主键
B.外键
C.排他约束
D.检查约束
E.唯一约束
F.非空约束
[多选题]Bas Time Table服务实现时间表的（ ）功能
A.编辑
B.下发
C.回读
D.执行
E.以上都不是
[单选题]使用FU指令是错误响应为TABLE NUMBER，说明（ ）。
A.表号错误
B.公司代码错误
C.航班号错误
D.格式错误
[单选题]PG中创建sequence时指定了owned to table.column，在drop table***cascade时，sequence不会被删除。
A.正确
B.错误
[单选题]alter table tb1 add airplane char(4);表示（）。
A.新建表
B.修改表
C.增加字段
[单选题]“DROP TABLE products CASCADE;”如另有一表order的外键基于表products创建，关于这条语句说法正确的是。
A.直接删除表products，不影响其他对象
B.直接删除表products，并且删除表order的外键约束。
C.直接删除表products，并会删除表order
D.不能删除表products，提示表order的外键依赖表products
