能使股利与公司盈利紧密结合的股利政策是______
A.剩余股利政策
B.固定股利政策
C.固定股利支付率政策
D.正常股利加额外股利政策
参考答案:C
The environment in our hometown is getting worse and worse. So many trees ________. [ ]
A. are planting
B. should be planted
C. should plant
D. will plant
如下图所示为白化病遗传系谱图(有关基因用A、a表示),请据下图回答:
Ⅱ2和Ⅲ1的基因型分别为()、()