在单偏光镜下，提升镜筒或下降物台，贝克线向矿物方向移动，矿物_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

在单偏光镜下，提升镜筒或下降物台，贝克线向矿物方向移动，矿物的表面显粗糙，边缘清晰，该矿物的突起为（）。

A、负突起

B、低正突起

C、正高突起

D、正极高突起

答案

参考答案：C

单项选择题

（）是指消费一定数量物品所获得的总的满足程度。

A.边际效用

B.总效用

C.无差异曲线分析

D.序数效用

完形填空

There is a small shop about 200 meters from where I live that sells groceries, meat and other basic necessities. About 10 years ago, there was a beggar who would go into the shop every day and ask the owner for a    36  . The owner,   37   he would love to help, simply didn’t have any jobs available, so he kept   38   the man’s request.
This situation continued    39   for a few months, until the owner    40    to give the homeless man a job which    41  sweeping outside the shop. Every single day from 5 am, the homeless man was there doing the very    42  he could for the    43  , even though it did earn him some pennies.    44   , the owner saw how good a job the man was doing and gave him a job working    45  a cashier. He was watched closely to make sure that he didn’t    46  any of the money received from the sales. He was still homeless, after all. The homeless man did a/an    47  job as a cashier for over 2 years, and did such a good job that he was promoted to    48   the finances for the whole shop.
To my    49  , this was the arrangement up until 2 years ago, when the owner     50   . In his will, he only had one    51   , to give the whole shop to the now stable, “homeless” man. Now, I could walk into that shop and see him working as hard as   52  , with his own business that is still   53   and active 10 years after getting his job as a sweeper.
From this story, we can probably get the inspiration: work hard and give everything your best effort, even if it isn’t your    54   situation, it very well may turn out to    55  some day in the future.

B．considering

C．passed away