【单选题】—What's your father doing now? —He _____ the room. [ ]
【单选题】客户表 customers 包含字段 : 客户编号 cid 和名称 cname,订单表 orders
A.
字段 : 客户编号 cid, 如果需要通过查询获得订单的客户的名称 , 下面查询语句中( )可以实
C.
SELECT costoners.cname FROM customers LEFT JOIN orders ON customers.cid=order.cid
D.
SELECT costoners.cname FROM customers INNER JOIN orders ON customers.cid=order.cid
E.
SELECT costoners.cname FROM customers RIGHT JOIN orders Where customers.cid=order.cid
F.
SELECTcostoners.cname FROMcustomers outer JOIN orders Where customers.cid=order.cid
【简答题】汽车操纵稳定性的路上试验包括低速行驶转向轻便性试验、稳态转向特性试验、瞬态横摆响应试验、汽车回正能力试验______________________、转向盘中间位置操纵稳定性试验。
【简答题】汽车操纵稳定性的路上试验包括低速行驶转向轻便性试验、稳态转向特性试验、瞬态横摆响应试验、______________________、转向盘角脉冲试验、转向盘中间位置操纵稳定性试验。
【判断题】根据HSB色彩三要素的知识,要把一幅彩色图像变成黑白图像需要把饱和度降低到最小值。
【单选题】— What's your feeling now? — I am terribly sorry. If only I here yesterday! [ ]
【简答题】汽车操纵稳定性的路上试验包括低速行驶转向轻便性试验、稳态转向特性试验、______________________、汽车回正能力试验、转向盘角脉冲试验、转向盘中间位置操纵稳定性试验。
【简答题】选择正确的答语。 ( ) 1. What's the temperature now? ( ) 2. What's your favourite shape? ( ) 3. How many lines are there in the picture? ( ) 4. How's the weather today? ( ) 5. Do you brush ...
【单选题】客户表customers包含字段:客户编号cid和名称cnaie,订单表orders包含字段:客户编号cid,如果需要通过査询获得有订单的客户的名称,下面査询语句中( )可以实现该需求
A.
SELECT customers, cname from customers LEFT JOIN orders ON customers. cid = orders. cid
B.
SELECT customers, cname from customers INNER JOIN orders ON customers.cid = orders. cid
C.
SELECT customers, cname from customers RIGHT JOIN orders where customers.cid = orders.cid
D.
SELECT customers, cname from customers JOIN orders WHERE customers.cid = orders.cid