构成照片影像的要素,不包括() A.密度 B.对比度 C.锐利度 D.灰雾度 E.颗

题型:单项选择题

问题:

构成照片影像的要素,不包括()

A.密度

B.对比度

C.锐利度

D.灰雾度

E.颗粒度

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若不等式x2-2x≤0 的解集为M,函数f(x)=ln(2-|x|) 的定义域为N,则集合M∩N=______.

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35岁妇女,近2年出现痛经且逐渐加重。查子宫后倾,如孕2个月大小,质硬。

为明确诊断,下列哪项检查是不必要的:()

A.超声检查

B.腹腔镜检查

C.宫腔镜检查

D.诊断性刮宫

E.CA125测定

题型:单项选择题

在饮食物的消化和吸收方面有依存关系的是哪两个脏

A.心与肾

B.肝与肺

C.肝与肾

D.肝与脾

E.心与肝

题型:单项选择题

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.

12()。

A. damaged

B. destroyed

C. broke

D. ruined

题型:单项选择题

管路系统的特性曲线是随着()的增加而上升。

A、流量

B、扬程

C、轴功率

D、效率

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