In human, color blindness is caused by sex linked recessive genes, while blue eye is caused by autosomal recessive genes. A blue eyed woman whose father is color blind marries a brown eyed man whose mother is blue eyed. How many of their sons are blue eyed? ( )
A: 1/2
B: 1/3
C: 1/4
D: 3/4
A: 1/2
B: 1/3
C: 1/4
D: 3/4
举一反三
- 若定义enum color {red=2, yellow, blue, white};那么blue的值为___________。 A: 0 B: 2 C: 3 D: 4
- 下列哪一项是CSS正确的语法构成？（ ）。 A: body:color=blue; B: {body:color:blue;} C: body{color:blue;} D: {body:color=blue;}
- 以下定义枚举类型正确的是() A: enum<br/>color={red, yellow, blue}; B: enum<br/>color={“red”, “yellow”, “blue”}; C: enum<br/>color{“red”, “yellow”, “blue”} D: enum<br/>color{red=3, yellow, blue};
- Which color indicates the harmony between nature and human-beings? A: red and green or blue B: dark blue and yellow or brown C: blue and red or orange D: black and purple or pink
- 以下选项中不能正确把 cl 定义成结构体变量的是 ______ 。 1 ． typedefstruct {intred; int green; int blue; } COLOR; COLOR cl; 2 ． structcolor cl { int red; int green; int blue; }; 3 ． structcolor { int red; int green; int blue; }cl; 4 ． struct {int red; int green; intblue; }c1;