产品生产和售后服务的不确定性是造成市场风险的原因之一。
Which of the following IBM storage products allows for 960 TB (raw) in one standard IBM rack?（） ["XIV system ","DS5300 ","DS8700 ","Storwize V7000"]
厕浴间、厨房采用涂膜防水时，最后一道涂膜施工完毕尚未固化前，应在其表面均匀地撒上少量干净的（），以增加与即将覆盖的水泥砂浆保护层之间的粘贴。 ["豆石","矿渣","细砂","粗砂"]
《教师专业标准》要求教师：在通识性知识领域做到“具有相应的艺术（）知识”。
Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables: EMPLOYEES EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2 (25) LAST_NAME VARCHAR2 (25) HIRE_DATE DATE NEW EMPLOYEES EMPLOYEE_ID NUMBER Primary Key NAME VARCHAR2 (60) Which DELETE statement is valid? （） [" DELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);"," DELETE * FROM employees WHERE employee_id = (SELECT employee_id FROM new_ employees);"," DELETE FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = ('Carrey')'"," DELETE * FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE last_ name = ('Carrey')'"]
戴维•哈威认为资本的运动过程是怎样的。
