【单选题】以下哪个SQL语句是正确的:
B.
create table (Code int primary key);
D.
select Code as ‘代号’ from users;
【单选题】Users with IAD often find it difficult to get along in their work.
【简答题】They are often shared by many users connected to the computer.
【判断题】公路运输主要承担短途运输和无铁路可通的长途货物的运输任务。
【判断题】在一间19平方米的室内进行紫外线消毒需要30W紫外线灯管3个。
【判断题】在一间19平方米的室内进行紫外线消毒需要30W紫外线灯管3个。()
【简答题】Email users need to log into their email_________ online to send and receive their emails.
【单选题】以下哪个SQL语句是正确的()
A.
insert into users values(‘p001’,’张三’,’男’);
B.
create table 表名(Code int primary key);
C.
update users set Code=’p002’ where Code=’p001’;
D.
select Code as ‘代号’ from users;
【判断题】公路货物运输主要承担短途运输和无铁路可通的长途货物的运输任务
【单选题】以下哪个 SQL 语句是正确的( )
A.
insert into users (‘p001’,’ 张三 ’,’ 男 ’);
B.
create table (Code int primary key);
C.
update users Code=’p002’ where Code=’p001’;
D.
select Code as ‘ 代号 ’ from users ;