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【简答题】
在期中考试中,某班数学成绩算术平均分为85分,标准差为20分;语文算术平均分为95分,标准差为22分,英语算数平均分为77分,标准差为21分,问该班英语、语文、数学三科成绩的差异哪个大?
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举一反三
【单选题】which vitamin maintain the functions of eyes ( )
A.
Vitamin D
B.
Vitamin C
C.
VitaminＡ
D.
VitaminB1
【单选题】Which kind of the following vitamin can prevent beriberi?
A.
Vitamin A
B.
Vitamin B
C.
Vitamin C
D.
Vitamin D
E.
Vitamin E
【简答题】Which vitamin do sunflower seeds have?A. Vitamin A. B. Vitamin B. C. Vitamin C. D. Vitamin E.
【单选题】Which of the following option is water soluble vitamin?
A.
vitamin A
B.
vitamin B
C.
vitamin E
D.
--
【单选题】which vitamin maintain the functions of eyes ( )
A.
Vitamin D
B.
Vitamin C
C.
Ｖｉｔａｍｉｎ Ａ
D.
ｖｉｔａｍｉｎ Ｂ１
【单选题】Which of the following is a vitamin containing metallic elements?
A.
Vitamin B1
B.
Vitamin B2
C.
Vitamin B6
D.
Vitamin C
E.
Vitamin B12
【简答题】A．It is calcium, not vitamin D, which is the direct source of hard bones. B．Vitamin C can be found in all kinds of green vegetables. C．The outside of rice also contains certain vitamins. D．People with...
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