【单选题】听力原文:W: Excuse me. M: Yes. W: I bought this MP3 here yesterday but it doesn't work. M: Oh, let's see what's wrong. W: This button doesn't work. When I push it nothing happens. M: You're right. I'll gi...
A.
The shop doesn't work.
B.
The button can't be pushed.
C.
The woman wants to change her MP3.
D.
The woman has lost her receipt.
【单选题】C: Excuse me. earlier. W: For ... C: Nothing. I 'm j ust figuring things out here. W: Good. But why are you sorry?
A.
I'm terribly sorry about
B.
I'm really sorry about
【单选题】关于人体直立的标准姿势以下哪项描述不正确?
A.
两足并拢,头颈、脊柱、臀裂和两足跟间应在一条垂直线上
B.
两侧肩峰、肩胛骨、髂嵴上缘的高度一致,两侧腰角对称
C.
髂骨后棘和耻骨联合之间的连线与髂骨后棘和髂前上棘的连线所构成的角度大于30°
D.
侧面观,头顶、耳屏前、肩峰、股骨大转子、腓骨小头和外踝尖各点应在一垂线上
E.
人体左右重量对称,不需要特殊的力量维持左右的平衡
【单选题】Excuse me . W here is the nearest supermarket ?
C.
I t is easy to get downtown
D.
I t is opposite the bank.
【判断题】载流导线所产生的磁场与地磁场之间,由于性质不同,不可以进行磁场的叠加 。
【简答题】图7-11为一加热炉的温度控制器,原料油在炉中被加热。试分析该系统中的被控对象、被控变量、操纵变量以及可能出现的干扰是什么?并画出系统的方块图。
【单选题】在图中加热炉温度控制系统中,被控变量、操纵变量分别是什么?
【单选题】在图中加热炉温度控制系统中,被控变量是()