【单选题】er: d 5. Mike consumes two commodities, x and y , and his utility function is min{ x + 2 y , y + 2 x }. He chooses to buy 8 units of good x and 16 units of good y . The price of good y is $.50. What i...
【单选题】造成人类遗传病的原因有多种。在不考虑基因突变的情况下,下列说法正确的是
A.
21三体综合征一般是由于第21号染色体结构异常造成的
B.
猫叫综合征是第5号同源染色体中缺失1条造成的遗传病
C.
冠心病属于多基因遗传病,这类遗传病在群体中发病率较高
D.
若父母表现型均正常,生一个患红绿色盲男孩的概率为1/4
【单选题】Who invented Movable Type Printing?
【单选题】Mike consumes two commodities, x and y; and his utility function is min{x +2y,y+2x}. He chooses to buy 8 units of good x and 16 units of good y. The price of good y is 0.50. What is his income?
【简答题】造成人类遗传病的原因有多种。在不考虑基因突变的情况下,回答下列问题:原发性高血压属于()基因遗传病,这类遗传病容易受环境因素影响,在人群中发病率较高。
【简答题】function y=two_min(x) if x<20 y=-exp(-(x/20).^2); else y=-exp(-1)+(x-20)*(x-22); end
【单选题】The young inventor wants to take out a ________ on his new type of printing machine.
【简答题】What are the advantages of movable type printing?
【简答题】invented the art of printing(movable type printing) in the Northern Song Dynasty.
【简答题】造成人类遗传病的原因有多种。在不考虑基因突变的情况下,回答下列问题:就血友病和镰刀型细胞贫血症来说,如果父母表现型均正常,则女儿有可能患(),不可能患()。这两种病的遗传方式都属于单基因()遗传