23、Penicillin acts both _____.
(A) killing bacteria and their growth being inhibited
(B) and to kill bacteria and to inhibit their growth
(C) kills bacteria and inhibits their growth
(D) by killing bacteria and by inhibiting their growth
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青黴素具有_____的雙重作用。(A) ...
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這題正確答案是： (D) by kil...
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