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皮皮学刷刷变学霸
举一反三
【单选题】Click the Exhibit button and examine the data in the EMPLOYEES table. On the EMPLOYEES table, EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID. The JOB_ID col...
A.
There is no row with dept_id 90 in the EMPLOYEES table.
B.
You cannot delete the JOB_ID column because it is a NOT NULL column.
C.
You cannot specify column names in the DELETE clause of the DELETE statement.
D.
You cannot delete the EMPLOYEE_ID column because it is the primary key of the table.
【简答题】亚硝酸钠的外观与食盐极为相似,容易被误用导致中毒.发生亚硝酸盐中毒时,若治疗不及时可导致死亡.小华为了解亚硝酸钠特从网上查到了如下的资料: A.亚硝酸钠是白色至淡黄色粉末或颗粒,味微成,易溶于水,外观及味道都与食盐相似; B.加热到271℃时,亚硝酸钠变成液体; C.亚硝酸钠能从空气中吸收氧逐渐转化为硝酸钠; D.亚硝酸钠与稀盐酸反应产生红棕色的二氧化氮气体. 根据上面的描述请你帮小华进行整理(用...
【简答题】_____ A. He lost his classmate’s homework. B. He can’t help the woman with her math. C. He broke the woman’s calculator. D. He doesn’t know where the ON button is.
【单选题】Click the Exhibit button and examine the data from the ORDERS and CUSTOMERS tables. Evaluate this SQL statement: SELECT cust_id, ord_total FROM orders WHERE ord_total > ANY(SELECT ord_total FROM order...
A.
A
B.
B
C.
C
D.
D
E.
E
【单选题】用于潮热骨蒸、盗汗、遗精、消渴等最佳药物是
A.
地骨皮
B.
山药
C.
熟地黄
D.
白芍
E.
黄精
【判断题】大阅读活动的核心是“师生家长同参与,学科门类全覆盖”。()
A.
正确
B.
错误
【判断题】由于物流中心的平面布局不同,所选用的设备型号和数量以及区域大小和布置方案都不同。()
A.
正确
B.
错误
【单选题】用于潮热骨蒸、盗汗、遗精、消渴等的最佳药物是
A.
地骨皮
B.
山药
C.
熟地黄
D.
白芍
E.
黄精
【多选题】物流技术的类型按物流技术的门类分类有:
A.
物流机械技术
B.
物流存储技术
C.
物流电子信息技术:
D.
物流管理中的数学方法:
【单选题】Click the Exhibit button and examine the data from the ORDERS and CUSTOMERS tables. Evaluate the SQL statement: SELECT * FROM orders WHERE cust_id = (SELECT cust_id FROM customers WHERE cust_name = 'S...
A.
A
B.
B
C.
C
D.
D
E.
E
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