甲胎蛋白阳性对下列哪种疾病最有诊断价值
A.原发性肝癌
B.肝转移癌
C.急性肝坏死
D.肝硬化
E.肝血吸虫
参考答案:A
The power of the test is:()
A. the probability of rejecting a true null hypothesis.
B. equal to the level of significance.
C. the probability of rejecting a false null hypothesis.
在下面的类定义中,this指针的用途是 【11】 。 #include <iostream. h> class Sample int x,y; public: Sample(int i,int j)x=i;y=j; void asstgn(Sample sa): ; void Sample: :assign(Sample p) if (this! =&p) x=p.x; y=p.y;