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【单选题】
下列关于Hive基本操作命令的解释错误的是A.
create database userdb;//创建数据库userdb
B.
create table if not exists usr(id bigint,name string,age int);//如果usr表不存在，创建表usr，含三个属性id,name,age
C.
load data local inpath ‘/usr/local/data’ overwrite into table usr; //把目录’/usr/local/data’下的数据文件中的数据以追加的方式装载进usr表
D.
insert overwrite table student select * from user where age>10; //向表usr1中插入来自usr表的age大于10的数据并覆盖student表中原有数据
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举一反三
【单选题】The phenomenon of pre-nups______.
A.
shows the improvement of people's life
B.
shows that people nowadays are more realistic than romantic
C.
is the product of women liberation
D.
shows that people don't believe each other
【判断题】When reference is made to an I/O device, the terms discrete input device, discrete output device, analog input device, and analog output device are commonly used to describe the type of device.
A.
正确
B.
错误
【单选题】A device used to enlarge the size of an existing bore hole, having teeth arranged on its outside circumference to cut the formation as it rotates is a(n) ______.
A.
enlarger bit
B.
casing bit
C.
hole opener
D.
casing opener
【单选题】The list of processes waiting for a particular I/O device is called a(n) ____.
A.
standby queue
B.
device queue
C.
ready queue
D.
interrupt queue
【单选题】如图是郑州市某天的温度随时间变化的图象,通过观察可知下列说法错误的是( )
A.
这天 15点温度最高
B.
这天 3点时温度最低
C.
这天最高温度与最低温度的差是 15度
D.
这天 21时温度是30度
【单选题】By the late 7 th century, became the dominant religion in England.
A.
Celtic Christianity
B.
Anglo - Saxons Christianity
C.
Germanic Christianity
D.
Roman Christianity
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