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【判断题】
在bookshop数据库中有5 个表，这五个表的结构描述见“实验数据库描述”。其中员工表employee(emp_no,emp_name,sex,dept,title,date_hired,birthday,salary,telephone,addr)，客户表customer(cust_name,receiver,tel_no,cust_Addr)，图书表books(book_no,book_name,price,book_type,ISBN)，销售主表sales(order_no,cust_name,sale_id,total_amt,order_date)，销售明细表sale_item(order_no,book_no,qty,unit_price)。针对数据库bookshop，删除的销售记录。可以使用以下SQL语句实现：delete from saleswhere sale_id in( select emp_no from employee where emp_name=’’ )A.
正确
B.
错误
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【单选题】It is comforting to see that ________， we are doing our part for the environment.
A.
as small may be we
B.
as we may be small
C.
small as may be we
D.
small as we may be
【单选题】According to the information from the airline, a small sinking part of the runway of the airport is _____________ for the accident.
A.
to blame
B.
to be blamed
C.
to blaming
D.
to be blaming
【单选题】Everyone of us lives and works on a small part of the earth's surface, moves in a small circle, and of these acquaintances knows only a few intimately. Of any public event that has wide effects we see...
A.
man's life is also insignificant.
B.
man's opinions can not be accurate at all.
C.
human observations in general are all but partial.
D.
man can not have any opinion.
【单选题】Everyone of us lives and works on a small part of the earth's surface, moves in a small circle, and of these acquaintances knows only a few intimately. Of any public event that has wide effects we see...
A.
man's life is also insignificant.
B.
man's opinions can not be accurate at all.
C.
human observations in general are all but partial.
D.
man cannot have any opinion.
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