問題詳情

17. ____, 70 percent alcohol is more effective than 100 percentalcohol.
(A) An antiseptic used
(B) When used as an antiseptic
(C) An antiseptic when used
(D) How an antiseptic is used

參考答案

答案：B
難度：簡單0.801802
統計：A(7),B(89),C(8),D(3),E(0)

用户評論

【helen41038】評論

我不確定是不是這樣：70 percent alcohol is more effective than 100 percentalcohol when （it is）used as an antiseptic.

【Wu JEN】評論

antiseptic 殺菌劑 防腐劑 消毒劑

【Sharon】評論

When alcohol is used as an antiseptic, .....When used as an antiseptic,...