【判断题】L298的四个输出端 OUT1~OUT4 连接八个整流二极管的目的是为了对输出波形进行整流。 ( )
【单选题】Why did the phone charge surprise the man?
A.
He didn’t make any calls.
B.
He didn’t talk with the woman.
C.
He didn’t know he owed so much.
【简答题】某资本主义企业投入固定资产150万元,其中厂房120万元,使用期限30年。机器30万元,使用期限5年。投入流动资本50万元,周转时间3个月。该企业年产值270万元,每月工人工资总额5万元。运用上述资料计算: (1) 年预付资本周转速度是多少? (2) 剩余价值率是多少? (3)年剩余价值率多少?
【单选题】受单向轴向力的螺旋传动宜采用________螺纹
【多选题】2009年初某生产建筑材料的企业家一次性投入资本2000万元,其中1500万元用于购置机器设备和建造厂房,300万元用作采购水泥、砖石等原材料,200万元用于支付工人工资 (一年的工资)。现已知该资本家在2008年通过销售建材获得的货款总额为1000万元。假定固定资本的年周转额是150万元。的那么,2008年该企业家
【单选题】Why is the English teacher angry with the man?
A.
Because the man didn't finish his homework last week.
B.
Because the woman didn't finish her homework last week.
C.
Because neither of the two speakers finished their homework last week.
【单选题】Why didn’t the man get the job at Microsoft?
A.
Because he disliked such a job.
B.
Because he didn’t pass the test.
C.
Because he didn’t have an e-mail account.
【判断题】已知Al的点阵常数为0.4049nm,其结构原子体积是0.01659【图片】
【简答题】Why didn't the man pass the exam? [ A] He didn't make full preparations. [B] He copied Smith's paper. [ C] Nobody helped him.