皮皮学,免费搜题
登录
搜题
【单选题】
在其他条件不变的前提下,若要求误差范围缩小1/3,则不放回抽样的样本容量应为( )。
A.
增加9倍
B.
增加8倍
C.
为原来的2.25倍
D.
增加2.25倍
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
【简答题】根据句意及首字母提示写出单词。 1.I often eat _________ at 7:00 a.m. 2. My dad often goes for a w________ after dinner. 3. Tom usually takes a ________ ( 舞蹈 )class on the weekend. 4. —Do you like playing s________? —...
【简答题】KVL的内容:任一时刻,沿任一( )的( )的代数和为( )
【简答题】I ’ m Zhao Kai. I have a good friend. His name is Ben. 1 He comes to China because (因为 ) his parents work in China. 2 He speaks English very well, but his Chinese isn ’ t good. I often help him with h...
【单选题】Waterlogged fields and coastal sand storms make people in parts of Guangdong Province introduce the 'dam-pond system' to raise fish in the pond and grow vegetables on tops of the dam around the pond.
A.
Y
B.
N
C.
NG
【单选题】“何当百忆莲花上,一莲花见佛身”这句诗出自?()
A.
《东下三旬苦于风土马上戏作》
B.
《赠荷花》
C.
《暮秋独游曲江》
D.
《送臻师》
【单选题】不能造成乱流,致使飞机颠簸的是
A.
大雾
B.
雷暴
C.
大风
D.
湍流
【单选题】I ’ m good at finding solutions to difficult situations. My friends often ask me to help them. They say I am a good problem solver. A problem solver .
A.
is good at finding the best way to do something
B.
needs a lot of help doing things
【单选题】. To help today’s customers make a choice, a company in New York _____a video trolley — a supermarket trolley with a video screen to display advertisement and price information.
A.
has invented
B.
had invented
C.
invents
D.
is inventing
【单选题】听力原文:M Thank you for calling Green Valley automotive. How may I help you? W Hello, I have a question about routine oil changes. I just bought a new car and was wondering how often I should come in and...
A.
He sells cars.
B.
He fixes cars.
C.
He imports cars.
D.
He works for an oil company.
【单选题】听力原文:M: Uh, where am I? W: Excuse me. Do you need any help? M: Nab, I… I'm just looking.., well... Uh, well, actually.., yeah. Um... [23]I want to go to the science museum, but I've been lost for the ...
A.
To the science museum.
B.
To the art museum.
C.
To the state museum.
D.
To the history museum.
相关题目: