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【单选题】
已知数据4,2,5,1的方差是2.5,则数据54,52,55,51的方差是( )A.
2.5
B.
2
C.
3
D.
1.5
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举一反三
【单选题】During his solo voyage, Chichester had _________ experienced fear like many other adventurers.
A.
doubtful
B.
doubtfully
C.
undoubtedly
【单选题】During his solo voyage, Chichester had ____________experienced fear like many other adventurers.
A.
doubtful
B.
doubtfully
C.
undoubtedly
D.
doubt
【单选题】鼓励失智老年人自主如厕,为了方便老年人如厕,卫生间内的卫生用品()。
A.
要放在高一点的地方,以免被水打湿
B.
要放在客厅内,当老年人需要时再送进去
C.
要放在老年人神手可以拿取的位置
D.
要放在照护员手里,如厕完毕送给老年人
【单选题】During his solo voyage, Chichester had ____________ experienced fear like many other adventurers.
A.
unfortunately
B.
hopefully
C.
undoubtedly
【单选题】He endured all kinds of hardships in his solo sailing around the world.
A.
suffered
B.
expected
C.
lasted
D.
overcame
【单选题】According to the man，when was his worst accident?
A.
During the British Grand Prix.
B.
During the Mexican Grand Prix.
C.
On his way to the studio.
D.
During his last race.
【单选题】Which of the following statements is not true during the author's solo traveling?
A.
She ate ethnic food with four youthful Chinese salarymen on her way through estern Korea.
B.
She spent a long afternoon in Thailand all alone in the back of a hay wagon.
C.
For seven days, she took a truck with a Brit, two Aussies and two Nowegians.
D.
A Texas couple nursed her with chocolate bars and tissues in China.
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