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【判断题】
选择带轮直径时，小带轮直径越小越好。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】How do teachers prevent girls from actively participating in class?
A.
By praising boy students and criticizing girl students frequently.
B.
By assigning girls tasks culturally considered as suitable for them.
C.
By assigning girls difficult math problems they are unlikely to solve.
D.
By asking girl students to prepare classroom materials in advance.
【单选题】To prevent a class from being instantiated, _____________________
A.
use the public modifier on the constructor.
B.
use the private modifier on the constructor.
C.
use the static modifier on the constructor.
D.
don't use any modifiers on the constructor.
【单选题】To prevent a class from being instantiated,_______________________
A.
use the static modifier on the constructor.
B.
don't use any modifiers on the constructor.
C.
use the private modifier on the constructor.
D.
use the public modifier on the constructor.
【单选题】The class teacher came up and put a jacket _____ the boy to prevent him from catching a cold .
A.
by
B.
with
C.
off
D.
over
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