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【简答题】
设容量 n = 10 的样本的观察值为(8,7,6,9,8,7,5,9,6,5),则样本均值= ,样本方差= 。
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举一反三
【单选题】中国革命道德具有丰富而独特的内涵,既包括革命道德的原则、要求、态度、修养、风尚等方面,也包括理想、思想意识方面的“应当”。贯穿中国革命道德始终的一根红线是
A.
坚持社会主义、共产主义理想和信念的不屈不挠的精神
B.
全心全意为人民服务
C.
始终把革命利益放在首位
D.
树立社会新风和修身自律、保持节操
【单选题】According to the passage, which of the following is not true?
A.
Women enjoy using umbrellas with varied kinds of colors nowadays.
B.
The inventor of the umbrella is unknown.
C.
Once ordinary people had no right to use umbrellas.
D.
Umbrellas were popular and cheap in ancient times.
【多选题】第7题 (多选题) 《精益思想》中提炼的精益管理原则包括( )。
A.
顾客确定价值
B.
识别价值流
C.
价值流动
D.
需求拉动
E.
尽善尽美
【单选题】作为你部分的研究,你发现钥匙越长,不正当的竞争者破解密码所耗时就越长。你还发现今天使用的大多数密钥是_______,所以你决定用这种大小的密钥。
A.
56位
B.
64位
C.
128位
D.
256位
【多选题】头脑风暴法的精华就在于它具有一定的原则,其中主要包括()、延迟评判、()、()等重要原则。
A.
自由畅想
B.
综合改善
C.
以量求质
D.
集思广益
【单选题】Wet umbrellas are not allowed _____ into the classroom. If there is any, then the monitor is ______ . [     ]
A.
to be taken, to blame
B.
to be taken, to be blamed
C.
being taken, to blame
D.
taken, to be blamed
【单选题】________ umbrellas / Umbrellas are commonly used to protect ________ from ________ rain.
A.
/ ... the ... the
B.
The ... the .../
C.
/ ... / .../
D.
The ... / ... the
【简答题】________ had the broken umbrellas mended in the umbrella shop.
【单选题】______ were the people who first used umbrellas.
A.
Chinese
B.
Romans
C.
Greeks
D.
Egyptians
【单选题】According to the passage, which of the following is not true?
A.
Women enjoy using umbrellas with various kinds of colors nowadays.
B.
The inventor of the umbrella is unknown.
C.
Once ordinary people had no right to use umbrellas.
D.
Umbrellas were popular and cheap in the ancient times.
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