有两个铜矿体,Ⅰ号矿体Cu的品位变化性指数(t)为0.2;Ⅱ号矿体Cu的品位变化性指

题型:单项选择题

问题:

有两个铜矿体,Ⅰ号矿体Cu的品位变化性指数(t)为0.2;Ⅱ号矿体Cu的品位变化性指数为0.8,说明()

A、Ⅰ号矿体沿某方向的变化是规则的;

B、Ⅱ号矿体沿某方向的变化是规则的;

C、虽然Ⅰ和Ⅱ号矿体的品位变化性指数有差别,但变化都是规则的。

考点:矿山工程技术矿产勘查理论与方法矿产勘查理论与方法题库
题型:单项选择题

根据对话内容,在横线上填写恰当的句子,使对话完整准确。

A: Excuse me, where is the nearest hospital?

B: 小题1:    . You'd better ask the policeman over there. He may know.

A: 小题2:    . (Go to the policeman)

A: Excuse me, which is the way to the nearest hospital?

C: Go down this street, turn left and walk on until you reach the end. And you will see the hospital. It’s between the post office and the fruit shop. You can’t miss it.

A: 小题3:    ?

C: It’s about thirty minutes,walk.

A. It,s too far away from here. 小题4:  ?

C: Yes, you can go there by bus. The bus stop is over there, on the other side of the road. A: I see. Thank you very much.

C:小题5: .

题型:单项选择题

设随机变量X1与X2相互独立,它们的均值分别为1与2,方差分别为4与9,则Y=2X1-X2的均值与方差分别为( )。

A.E(Y)=0

B.E(Y)=4

C.Var(Y)=25

D.Var(y)=4

E.Var(Y)=7

题型:单项选择题

寒邪的致病特点有:

A.易阻遏气机

B.易伤脾阳

C.易致气血凝滞

D.易致筋脉挛缩

E.易伤人体下部

题型:单项选择题

以租赁方式进口的货物,以海关审查确定的该货物的租金作为完税价格。( )

题型:单项选择题

患者胸膈烦热,面赤唇焦,烦躁口渴,口舌生疮,咽痛吐衄,大便秘结,小便短黄,舌红苔黄,脉滑数。治宜()

A.白虎汤

B.黄连解毒汤

C.大承气汤

D.凉膈散

E.犀角地黄汤

更多题库