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 = 'Smith'); What is the result when the query is executed?（） ["A","B","C","D","E"]
磨料磨损
当直流电动机的实际转速大于空载转速时，这种状态称为（） ["反接制动状态","反馈制动状态","电动状态","能耗制动"]
整体式简体结构有（）以及电渣重熔等结构型式。 ["单层卷焊","整体锻造","锻焊","铸一锻焊"]
有位学者把17世纪40年代明朝崇祯帝和英国查理一世两位君主的暴亡，视为两个民族历史的一个楔子――世界的天平开始失衡，西方的崛起、东方的没落明显加快。该学者观察问题的依据是（）。 ["A.政权发生更替 ","B.社会形态转变 ","C.国力对比变化 ","D.文化途径迥异"]
某轿车重12KN，轴距3m，重心距前轴1.3m。现有两种类型的轮胎可供使用：子午线轮胎，每个轮胎的侧偏刚度为46KN/弧度；斜交帘线轮胎，每个轮胎的侧偏刚度为33KN/弧度。若同轴只能装用同类型轮胎，在何种情况下该车将具有过多转向特性？
