A new theropod dinosaur,Shidaisaurusjinae gen.et sp.nov.,has been described on the basis of an incomplete skeleton.The s......

对思茅松毛虫成灾与14个林分因子进行逐步回归分析,从中筛选出主层林郁闲度、林木生长势、坡向和海拔高度4个关键因子,并用这4个因......