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【单选题】
当玩具在眼前消失，儿童认为它仍然是存在的。与这个描述对应的概念是A.
客体永久性
B.
知觉恒常性
C.
运算
D.
守恒 本题为单选题，求解答，谢谢！
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皮皮学刷刷变学霸
举一反三
【单选题】My hope was to give a somewhat smaller party, and perhaps we can agree ______ a date that would allow me time to prepare.
A.
with
B.
on
C.
to
D.
for
【简答题】党的总支部委员会和()委员会设纪律检查委员。
【简答题】My hope was to give a somewhat smaller party, and perhaps we can agree____ a date that would allow me time to prepare.
【单选题】I felt somewhat disappointed and was about to leave____ something occured which attracted my attention.
A.
unless
B.
until
C.
when
D.
while
【简答题】_________ I felt somewhat disappointed and was about to leave，something occurred which attracted my attention. A．Unless B．Until C．When D．While
【简答题】党的总支部委员会和支部委员会设（ ）。A. 纪律检查委员 B. 纪律检查委员会 C. 纪律检查委员或纪律检查委员会 D. 纪律检查委员会书记
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