【单选题】下列哪项不是中孕期母血清学产前筛查的生化指标?( D)
【单选题】下列哪项不是中孕期母血清学产前筛查的生化指标?
【单选题】铣床工作台纵向移动对工作台面的平行度允许的最大误差为( )。
【单选题】铣床工作台纵向移动对工作台面的平行度误差检验的允差值应为()
B.
在任意400mm测量长度上允差0.025mm
D.
在任意300mm测量长度上允差0.025mm
【单选题】下列代码的输出结果是() void fun(int); main( ) { int w=2; fun(w); } void fun(int k) { if (k>0) fun(k-1); printf("%d",k); }
【单选题】下列哪项不是中孕期母血清学产前筛查的生化指标 ?
【单选题】下列代码的输出结果是: fun(int a, int b) { if(a>b) return a; else return b; } main() { int x=3,y=8,z=6,r; r=fun(fun(x,y),2*z); printf("%d\n",r); }
【单选题】下列代码的输出结果是() void fun(int); main( ) { int w=2; fun(w); } void fun(int k) { if (k>0) fun(k-1); printf(“%d”,k); }
【单选题】Suppose that for the past two months, you have studied economics one hour a day. You now decide to study economics two hours a day. For the past two months, ________. (假设在过去的两个月里,你每天都在学习经济学。你现在决定每天两个...
A.
your marginal cost of studying economics for an hour must have exceeded its marginal benefit你经济学一小时的边际成本必须超过其边际收益
B.
the marginal cost of studying economics must have fallen研究经济学的边际成本必须下降
C.
your marginal benefit from studying economics an hour must have been greater than its marginal cost小时学习经济学的边际效益必须大于其边际成本
D.
the opportunity cost of studying economics must have risen.学习经济学的机会成本必须上升。