【单选题】听力原文:I wonder if you can give me a hand right now. (A) Sorry, I only have two hands. (B) Of course I can. Here you are. (C) Certainly. What can l do to help you? (35)
【单选题】关于力的概念,下面哪个说法是不正确的?
D.
力是一个既有大小又有方向的量,因此,力是矢量
【多选题】以向量来解释心室的除极过程,正确的是:
A.
向量是数学上的概念,是既有方向、又有大小的量。
B.
某一时刻心室向量的大小和方向与心室肌的厚薄相关。
C.
心室除极一次所需时间,即是QRS波群的宽度。
【单选题】— ________________ — I have two books. [ ]
A.
How many books do you have?
【单选题】客户信息管理是将客户的各项信息加以系统( ),以此来巩固企业与客户之间关系,从而提升销售成绩的工作。
【单选题】听力原文:M: Henry has four classes on Wednesday and Peter has three. W: I only have two, but I have five on Thursday. Q: How many classes does the woman have on Wednesday? (5)
【简答题】阅读理解。 My name is Dave. I am not an only child. I have three brothers and two sisters. Sometimes they play with me. I am studying in a middle school now, but I am not a good student. I often get in...