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【单选题】
函数 在定义域R内可导，若 ，且当 时， ，设a=f(0).b= 则 （ ）A.
a
B.
c
C.
c
D.
b
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【单选题】一匹雄性黑马与若干匹纯种枣红马交配后，共生出20匹枣红马和23匹黑马。下列叙述中最可能的是（）①雄性黑马是杂合体②黑色是隐性性状③枣红色是显性性状④枣红色是隐性性状
A.
①和④
B.
②和③
C.
①和③
D.
②和④
【单选题】一匹雄性黑马与若干匹纯种枣红马交配后,共生出20匹枣红马和23匹黑马。下列叙述中最可能的是( ) 1雄性黑马是杂合体 2黑色是隐性性状3枣红色是显性性状 4枣红色是隐性性状
A.
①和④
B.
②和③
C.
①和③
D.
②和④
E.
① 和②
【单选题】Advance in food preservation gave consumers in developed countries access to ______all foods grown in distant lands.
A.
extensively
B.
virtually
C.
artificially
D.
continually
【单选题】Advance in food preservation gave consumers in developed countries access to ______all foods grown in distant lands.
A.
extensively
B.
virtually
C.
artificially
D.
continually
【多选题】Food preservation methods includes .
A.
Addition of Heat
B.
Removal of Heat
C.
Osmotic Pressure
D.
Remove the water
【单选题】Could you provide______? [ ]
A.
me some food
B.
me for some food
C.
some food to me
D.
me with some food
【多选题】一匹雄性黑马与若干匹纯种枣红马交配后，共生出20匹枣红马和23匹黑马．下列叙述中最可能的是①雄性黑马是杂合子 ②黑色是隐性性状 ③枣红色是显性性状 ④枣红色是隐性性状（ ）
A.
①
B.
②
C.
③
D.
④
【单选题】Advances in food preservation gave us access to ______ all foods grown in distant lands.
A.
extensively
B.
virtually
C.
artificially
D.
continually
【多选题】Food preservation methods includes
A.
Addition of Heat
B.
Removal of Heat
C.
Osmotic Pressure
D.
Remove the water
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