【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】听力原文:How many of those black markers do we have left? (A) There are only two, I think. (B) I also have a blue one. (C) He said to check on the right side. (21)
【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?
【简答题】泊松过程是一个()过程, 表示[0,t)区间内到达的用户总数,同时也是一个()过程,在两个不同时间区间内到达的用户数相互独立。
【单选题】当基础应计算混凝土运输脚手架时,按满堂脚手架基本层定额乘系数( )。
【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...