21 What can be inferred from the passage?
(A) Solving math problems is not healthy for normal people.
(B) People of different cultures may have different attitudes towards math.
(C) German and Russian students do not perform well on math tests.
(D) Math anxiety affects only children.
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統計: A(8), B(211), C(29), D(8), E(0) #1209204
統計: A(8), B(211), C(29), D(8), E(0) #1209204