单项选择题

A．preserve
B．conserve
C．resume
D．assume
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单项选择题
A．orientationB．implicationC．successionD．presentation
A．orientation
B．implication
C．succession
D．presentation
单项选择题
Why do the staff members cover themselves with cloth as they work
A．So that they are protected from scratches by the crane’s talons.
B．So that they aren’t exposed to infectious diseases.
C．So that the chicks can be examined in a sterile environment.
D．So that the chicks don’t become dependent on human being.
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