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【简答题】
食用菌在生长发育中所需要的营养物质主要有四大类，即[填空(1)]、[填空(2)]、[填空(3)]和[填空(4)] 。
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举一反三
【单选题】An organizational structure that contains only line positions and no staff positions is referred to as a _____ organization.
A.
line
B.
staff
C.
line-and-staff
D.
tall
【单选题】An organizational structure that contains only line positions and no staff positions is referred to as a _____ organization.
A.
line
B.
staff
C.
line-and-staff
【单选题】A combination of corrosion and erosion caused wastage in the main ballast line，which directly led to the leak ______．
A.
draff
B.
wastage
C.
mullock
D.
obsolete
【单选题】The runners are_________ their positions on the starting line. [ ]
A.
taking up
B.
picking out
C.
turning on
D.
getting down
【单选题】The runners________ several times ________their positions on the starting line, otherwise they will be kicked out.
A.
are warned, making up
B.
warn, to make up
C.
have been warned, to take up
D.
warn, to have taken up
【单选题】A line connecting all possible positions of your vessel at any given time is a __________
A.
longitude line
B.
line of position
C.
latitude line
D.
fix .
【单选题】A line connecting all possible positions of your vessel at any given time is a（）.
A.
longitude line
B.
latitude line
C.
line of position
D.
fix
【简答题】手持 哑铃 仰卧夹胸运动 可以发展 ___________肌的力量,此时该肌为 固定 收缩。
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