皮皮学，免费搜题
登录
搜题
【单选题】
掷一颗骰子1620次，则“六点”出现的次数 X 的方差分别为（）A.
810，450
B.
810，225
C.
270，225
D.
270，450
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】听力原文：Consider three major recent California earthquakes: Loma Prieta in 1989, with a 6.9 magnitude, Northridge in 1994, with a 6.7 magnitude, and San Simeon/Paso Robles on December 22, 2003, with a 6....
A.
正确
B.
错误
【简答题】无论总角度在什么位置，它必须是一个（）镜头。
【简答题】III 阅读理解（共20小题；每小题2分，满分40分） 阅读下面短文，从每题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。 April 27 is Take Our Daughters to Work Day in Britain. Started at first in the Unite States and brought to Britain in 1994, Take...
【简答题】April 27 is a special day in Britain. It’s called Take Our Daughters to Work Day. It was __ 36__ to Britain in 1994 from America. On that day thousands of girls take a day __ 37__ school and go with o...
【简答题】无论总角度在什么位置,它必须是一个( )镜头,只有这一景别的镜头能够充分说明参与对话的人物关系以及这些人物和环境的关系 。
【单选题】Task 1 Directions: After reading the following passage, you will find 5 questions or unfinished statements, numbered 36 through 40. For each question or statement there are 4 choices marked A, B, C, a...
A.
In the early 1970s.
B.
In the late 1970s.
C.
From1973 to 1994.
D.
In 1994.
【简答题】bi r a. 有苦味的;苦的;很冷的
【单选题】Task 1 Directions: After reading the following passage, you will find 5 questions or unfinished statements, numbered 36 through 40. For each question or statement there are 4 choices marked A, B, C, a...
A.
In the early 1970s.
B.
Inthelate1970s.
C.
From1973to 1994.
D.
ln1994.
相关题目：