【单选题】下列哪一项不属于实验猕猴的一般特性()。
A.
一般栖居于树木和岩石坡面上,少数在平原地面上。一般难于驯养。
B.
缺乏维生素C合成酶,所以自身不能合成维生素C,所需维生素C来源于饲料。
C.
猕猴聪明伶俐、模仿力极强具有发达的大脑,有大量的脑回和脑沟,善攀登,跳跃,会游泳。有较发达的智力和神经控制。能用手操纵工具。
【简答题】完形填空。 John is an artist(画家). He lives next to Jane. He spends(花费) much 1 drawing pictures and he is 2 all the time. He doesn’t like to talk to 3 when he is working. His friends 4 him well. If they wan...
【简答题】根据对话意思和所给首字母,写出完整正确的单词。 Dear Li Lei, Thank you for your last letter. I’d like to tell you about a good (1) f __ of mine. His name is John. Next week, he will (2) v ___ China, but he knows nothing abou...
【简答题】用机械按横挖法挖路堑且弃土(或以挖作填)运距较远时,宜用挖掘机配合自卸汽车进行。每层台阶高度可增加到( )。
【简答题】根据对话意思和所给首字母,写出完整正确的单词。 Dear Li Lei, Thank you for your last letter. I’d like to tell you about a good 小题1: f __ of mine. His name is John. Next week, he will 小题2: v ___ China, but he knows nothing ab...