32. China is the world's largest coal user and producer, but has also become a leading investor in _______ forms
of energy, such as solar and wind power.
(A) suspended
(B) renewable
(C) irregular
(D) majestic
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統計: A(1), B(4), C(1), D(3), E(0) #3297273
統計: A(1), B(4), C(1), D(3), E(0) #3297273