气侵井液可减小井底压力足以引起井涌，但什么时候井底压力减少最大？（） A.气体接近地

按照房产原值计税的房产，无论会计上如何核算，房产原值均应包含地价，包括为取得土地使用权支付的价款、开发土地发生的成本费用等。如果宗地容积率低于0.5的，下列有关房产原值的确定方法正确的是( )。

A．按房产占用的土地面积计算土地面积并据此确定计入房产原值的地价
B．按房产建筑面积的2倍计算土地面积并据此确定计入房产原值的地价
C．按开发面积确定计入房产原值的地价
D．按购进土地时支付的价款确定计入房产原值的地价

When I was young, my parents ran a snack bar in our small town.

One evening in early April, my mother told me to fill in at the snack bar (1) a worker who had the flu. I told her I would mess it up, (2) I had never worked at the bar before. I (3) that instead of making money, I would end up owing it.

"You can do it, " said my mother, " (4) , you won’t get much business until lunch. "

"But I’ll never remember the orders, and I’m no good (5) money. Please, Mom, don’t (6) me. "

"Then I’ll help you", she said.

I shrugged my shoulders. I thought my mother’s (7) was a bad one, but I (8) .

When I got to the bar the next day, I found my mother was (9) . Because the weather that day was rainy and cold, people wanted hot snacks and drinks. (10) , I was really slow at taking the orders and making change. The line of people grew, and everybody seemed (11) , I was so nervous that my hands shook, and I (12) a cup into pieces. What a mess! Then my mother came to (13) me, and she also showed me how to make (14) If someone gave me $ 5 for something that cost $ 3.25, I handed over (15) quarters and a dollar and said, "75 cents makes four dollars, plus one dollar makes five. " Things went more (16) after that.

By the end of the day, I could remember orders, (17) the bill, and make change quickly with a smile. I was even a little (18) when the sun came out and dried up business. My mother said she was proud of me, and when she (19) that I work at the snack bar again next year, I did not even shrug. I was too busy (20) the restaurant I would open one day.

20（）。

A. imagining

B. preparing

C. examining

D. describing

指数型ETF能否发行成功与( )的选择有密切关系。

A．证券交易所

B．基础指数

C．受托人

D．投资者

手工钨极氩弧焊机电弧引燃后不稳定，可能的原因是（）。

A.气路阻塞

B.焊炬开关接触不良

C.直流分量的元件故障

D.控制变压器故障

表彰性公文中决定和通报可以互用。