【单选题】某药材呈四方形或不定形块状,大小不等。表面铁黑色或黑红色,研成粉末血红色。该药材来源于()
【简答题】句型转换. 把下列直接引语变为间接引语。 1. 'Don't look out of the window,' the teacher said. →The teacher ______ ______ ______ ______ look out of the window. 2. He said to her, 'Do some shopping for me, please.' →He a...
【单选题】引起生物可遗传的变异的原因有3种,即染色体变异、基因突变和基因重组。以下几种生物性状的产生,来源于同一种变异类型的是( ) : 1豌豆的高秆白花、矮秆红花;2六倍体小黑麦的出现;3果蝇的残翅; 4玉米的白化病; 5人类的镰刀型细胞贫血症
【简答题】红小豆:源于____,现主要分布在____、华北、黄河流域、长江流域及华南地区。
【简答题】语法专练。将下列句子由直接引语变为间接引语 1. The teacher said,'Don't be late again,Mary.' _________________________________________ 2. The boy said,'How cool the film star is!' _________________________________________ 3...
【简答题】把下面间接引语变成直接引语. 1. Tom said he was not lucky enough then. _____________________________________________ 2. Jack said his sister wasn't a college student. _____________________________________________ 3...
【判断题】狭义的产品安全,是指产品不会给消费者带来身体和心理上的伤害;广义的产品安全概念还包含了不会给消费者带来经济受损的内容。( )