阿摩線上測驗
20. Dyscalculia is a learning difficulty that impacts students' ability to do math. Children with dyscalculia usually
have difficulty_______ numbers, symbols, and related concepts.
(A) understand
(B) understanding
(C) to understand
(D) to understanding
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統計： A(42), B(260), C(124), D(50), E(0) #2722238
統計： A(42), B(260), C(124), D(50), E(0) #2722238
