水泥的3日和28日的抗压强度和抗折强度是采用（）测定的。 ["胶砂法","坍落度","干燥器法","穿孔法"]
Examine the structure of the EMPLOYEES table: You issue these statements: At the end of this transaction, what is true?（） [" You have no rows in the table."," You have an employee with the name of James."," You cannot roll back to the same savepoint more than once."," Your last update fails to update any rows because employee ID 180 was already eleted."]
单位工程施工质量合格标准中规定工程外观质量得分率达到（）以上。 ["50%","70%","80%","90%"]
价格指数调整法通常是用于（）的机器设备的重置成本估测。 ["技术进步速度不快","技术进步因素对设备价格影响不大","技术进步因素对设备价格影响很大","单位价值较小的自制设备","价值量较大的设备"]
电子式压力传递仪的原理是：（） ["差动静电容式","力平衡式","变位平衡式"]
钻削冷作硬化现象是由（）产生的。
