【判断题】在线实体实验控制的设备是真实存在的,对吗?
【判断题】高炉炼铁的主要产品为生铁,副产品包括炉尘、炉渣和高炉煤气。
【单选题】侧重于学生操作能力的评价,描述的是哪一种测验的功能?
【简答题】A.8×10 9 /L B.9×10 9 /L C.10×10 9 /L D.12×10 9 /L E.接近成人水平
【单选题】(9-12 from P.105-109)Why was the process of taming almost always involved with the castration of male animals?
A.
Because it restrains male aggression and enables humans selectively to control the herd’s procreation.
B.
Because castrated(阉割的)livestock gain weight quicker than livestock that have not been castrated.
C.
Because animals that have not been castrated produce a tougher carcass and the flavor of the meat is strong.