【简答题】UNIT 2 PART 1 SECTION B TASK 3 Listen
to the following passage. Choose the best answer to each question. (You
are required to finish the question 6, question 7 and question 8
altogether.) What is t...
【单选题】Passage 1 Question 16 to 18 are based on the passage you have just heard. question 16.mp3:
A.
Ignore small details while reading.
B.
Read at least several chapters at one sitting.
C.
Develop a habit of reading critically.
D.
Get key information by reading just once or twice.
【简答题】将区域 D={(x,y)|x2+y2≥1 , x2+y2≤9 , y≥0} 化成 θ 型区域,正确的是( A )。 A 、 0≤θ≤π , 1≤ρ≤3 B 、 0≤θ≤2π , 1≤ρ≤3 C 、 0≤θ≤π , 1≤ρ≤9 D 、 0≤θ≤2π , 1≤ρ≤9
【简答题】如图,从A 1 (1,0,0)、A 2 (2,0,0)、B 1 (0,1,0)、B 2 (0,2,0)、C 1 (0,0,1)、C 2 (0,0,2)这6个点中随机选取3个点,将这3个点及原点O两两相连构成一个“立体”,记该“立体”的体积为随机变量V(如果选取的3个点与原点在同一个平面内,此时“立体”的体积V=0). (1)求V=0的概率; (2)求V的分布列及数学期望E(V).
【简答题】当问到是否感到自己已经步入成年期时,大学生的回答经常是不确定的,在一定程度上“是”,在一定程度上又“不是”,这体现了成人初显期的什么特点?
【简答题】将-2,-1,0,1,2,3,4,5,6这9个数分别填入图方阵的9个空格中,使得横、竖、斜对角的3个数相加的和为6。
【简答题】如图,从A 1 (1,0,0),A 2 (2,0,0),B 1 (0,1,0,)B 2 (0,2,0),C 1 (0,0,1),C 2 (0,0,2)这6个点中随机选取3个点。 (1)求这3点与原点O恰好是正三棱锥的四个顶点的概率; (2)求这3点与原点O共面的概率。
【单选题】Q5-3-2_1.mp3 Textbook. Page 107 Long conversation. Question 1 to 4 are based on the conversation you will hear. 1.
A.
Having no ice cold lemon juice to ease the crazy heat.
B.
Awful job, hot weather and walking outside.
C.
Having to pay his rent immediately.
D.
Graduating from college without his own business.
【简答题】将-4,-3,-2,-1,0,1,2,3,4这9个数分别填在如图1中的9个空格中,使得每行、每列、斜对角上的三个数相加的和均为0.再根据图1的结果填写图2,要求图2中空格内的数各不相等,且每行、每列、斜对角上的三个数相加的和相等.
【简答题】如图,从A 1 (1,0,0),A 2 (2,0,0),B 1 (0,2,0),B 2 (0,2,0),C 1 (0,0,1),C 2 (0,0,2)这6个点中随机选取3个点,将这3个点及原点O两两相连构成一个“立体”,记该“立体”的体积为随机变量V(如果选取的3个点与原点在同一个平面内,此时“立体”的体积V=0)。 (1)求V=0的概率; (2)求V的分布列及数学期望EV。