【多选题】从旅游业利用的角度出发,旅游资源可以分为( )。
【多选题】生物膜中所含糖类主要的存在形式是( )。
【多选题】采用企业价值比较法时,在最佳资本结构下,下列说法正确的有( )。
【简答题】A.persisted B.guaranteed C.convinced D.trusted
【单选题】I have always found that it's helpful to have a few wise and trusted people to ---- you can turn for information and advice.