【单选题】The estimated broad-sense heritability for milk production in a herd of dairy cattle is high. Which is a valid inference?
A.
Most of the variation in milk production in the herd is due to additive genetic variance within the herd.
B.
Most of the variation in milk production in the herd is due to dominant genetic variance.
C.
Little of the variation in milk production is due to environmental variation within the herd.
D.
Selective breeding for high milk production in this herd will be effective.
E.
Broad-sense heritability for milk production will be high in most other herds of dairy cattle.
【单选题】下列有关泛型的代码中,ArrayList list = new ArrayList (); 说法正确的是( )
C.
list 集合里面能存放Person的子类对象
D.
list 集合里面可以存放Object类型的对象
【简答题】C#中对于集合ArrayList list1 = new ArrayList() 和 Lsit list2 = new List () 的操作,没有语法错误的是:()A. list1.Add(100); B. list2.Add(100); C. string str = list2[0]; D. string str = list1[0];
【单选题】The output from the following code is __________. java.util.ArrayList list = new java.util.ArrayList(); list.add("New York"); java.util.ArrayList list1 = (java.util.ArrayList )(list.clone()); list.add...
C.
[New York, Atlanta, Dallas]
【多选题】关于试用买卖合同,下列表述正确的有( )。
A.
当事人对试用期间没有约定,依照有关规定仍不能确定的,为约定之日起6个月
B.
在试用期内,买受人将标的物抵押给他人,此行为不视为买受人同意购买
C.
当事人约定标的物经过试用或者检验符合一定要求时,买受人应当购买标的物的,此情形不属于试用买卖
D.
当事人约定买受人在一定期间内可以调换或退还标的物的,此情形不属于试用买卖
【多选题】《劳动合同法》关于试用期的规定有( )。
C.
以完成一定工作任务为期限的劳动合同不得约定试用期的情形
【单选题】如果Man类是Person类的子类,ArrayList list=new ArrayList ();list中可以放哪些对象?