皮皮学，免费搜题
登录
搜题
【简答题】
假设 a=10 , b=4 , c=5 , d=1 , 则下列表达式的计算结果值为 a
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】实际液体的水力坡度 J 为
A.
J <0< /div>
B.
J= 0
C.
J> 0
D.
J = J p
【单选题】若函 数 y = f ( x ) 是一随机变量 X 的概率密度,则( )一定成立。
A.
y = f ( x ) 的定义域为[0,1]
B.
y = f ( x ) 非负
C.
y=f(x)的值域为[0,1]
D.
y = f ( x ) 在 内连续
【单选题】Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45. A lawyer friend of mine has devoted herself to the service of humanity. Her spe...
A.
she has tried to earn her living by providing service for human beings
B.
she has tried to provide service to people in need of humane consideration
C.
she has tried to work for the cause of law at any cost
D.
she has devoted herself to the public relationship in spite of loss of income
【单选题】Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45. George had stolen some money. The police had caught him and he had been put in ...
A.
A person who works in a court.
B.
A police officer.
C.
A judge.
D.
A group of people who decide if someone on trial is guilty or not.
【单选题】Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45. A few ways Greyhound can make your next trip even easier. Tickets By mail. Avoi...
A.
an airline
B.
a hotel
C.
a website
D.
a bus company
【单选题】若函数y=f(x)为随机变量X的概率密度,则下列说法一定正确的是
A.
f(x)的定义域为[0,1]
B.
f(x)的值域为[0,1]
C.
f(x)非负
D.
f(x)在(-∞,+∞)连续
【单选题】若 y = f(x) 是连续随机变量 X 的概率密度,则有
A.
f (x) 的定义域为 [0 ， 1]
B.
f (x) 的值域为 [0 ， 1]
C.
f (x) 非负
D.
f (x) 在实数轴 上连续
【简答题】设二维随机变量 的联合概率密度函数为 f ( x , y ) ,若等式 f ( x , y ) = f 1 ( x ) 、 f 2 ( x ) ( f 1 ( x ) 、 f 2 ( x ) 分别为 X 和 Y 的概率密度函数),则 X 与 Y 的 关系是 。
相关题目：
【单选题】实际液体的水力坡度 J 为
A.
J <0< /div>
B.
J= 0
C.
J> 0
D.
J = J p
【单选题】若函数y=f(x)为随机变量X的概率密度,则下列说法一定正确的是
A.
f(x)的定义域为[0,1]
B.
f(x)的值域为[0,1]
C.
f(x)非负
D.
f(x)在(-∞,+∞)连续