差压流量计正压管线不畅,仪表指示偏(),带反吹风差压表正压管嘴不畅,仪表指示偏()
参考答案:小;大
An investor has a $15000 portfolio consisting of $10000 in stock A with an expected return of 20 percent and $ 5000 in stock B with an expected return of 10 percent. What is the investor's expected return on the portfolio()
A.7.9%.
B.12.2%.
C.16.7%.
“阳关大道”原是指通往哪里的道路:()
A.东海
B.西域
C.南国
D.漠北
E.中原