【单选题】We learn from the passage that corals need plants for _______.
【单选题】These plants cannot ______ in very cold conditions.
【判断题】具有光子能带结构的介电物质,称为光能隙系统。()
【判断题】利用矿物不同的电性而在电场中分离的一种选矿方法称为电选。
【简答题】I’m very interested in wild animals _____________ plants.