一 Some Chinese students find it difficult to understand native speakers when in London. — Exactly, _____ they've learned a lot about grammar and known many words. [ ]
A.
if only
B.
now that
C.
as if
D.
even if
拍照语音搜题,微信中搜索"皮皮学"使用
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举一反三
【简答题】浆粕浸渍在20°C,17.5%NaOH水溶液中,在45min内 溶解部分为 ( ) A : α-纤维素 B : α-纤维素 C : γ-纤维素 D : β-纤维素