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【单选题】
知觉的条件在一定范围改变时，知觉映象却保持相对稳定，这种特征是知觉的( )A.
理解性
B.
恒常性
C.
整体性
D.
选择性
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】（辽宁卷） 23 ． Susan decided not to work on the program at home because she didn’t wanther parents to know what she __________.
A.
． has done
B.
． had done
C.
． was doing
D.
． is doing
【单选题】The football player felt extremely _____________ after they won the .
A.
luck
B.
lucky
C.
luckily
D.
unlucky
【单选题】Susan decided not to work on the program at home because she didn’t want her mother to know what she _____.
A.
has done
B.
had done
C.
was doing
D.
is doing
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