【判断题】自色是由矿物的化学成分和晶体结构所形成的矿物本身的固有颜色。( )
【单选题】-- Does Jimmy always go to school by bus?
A.
- No, rather than __________ on a crowded bus, he always prefers __________ a bike.
【单选题】--Does Jimmy always go to school by bus? --No. Rather than _____ on a crowded bus, he always prefers ______ a bike.
【多选题】电波传播环境中,以下哪些一般属于阴影衰落?( )
【多选题】电波传播环境中,以下哪些一般属于阴影衰落?( )
【判断题】中国茶类可划分为基本茶类和再加工茶类两类。