关于鼻窦黏液囊肿的描述，正确的是（） A.好发于上颌窦 B.CT表现为窦腔内较低软组

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.

 

第（13）空应选择（）

A．scold

B．help

C．beat

D．save

IgA肾病最典型的表现（）。

A.上呼吸道感染后24~72小时后出现突发性肉眼血尿

B.上呼吸道感染后1~3周后出现突发性肉眼血尿

C.血尿、蛋白尿、高血压、尿量减少、轻度浮肿

D.肾病综合征

E.以上都不是

A、B两家公司均从事家用电器制造和销售，其2006年的有关资料如下(单位：万元)：

市场状况	概率	A公司			B公司
	50%	息税前利润	利息	固定成本	息税前利润	利息	固定成本
繁荣	30%	1000	150	450	1500	240	750
正常	20%	800	150	450	1200	240	750
萧条		500	150	450	900	240	750

　　要求：
　　(1)计算A、B两家公司息税前利润的期望值；
　　(2)计算A、B两家公司息税前利润的标准差；
　　(3)计算A、B两家公司息税前利润的标准离差率；
　　(4)家用电器行业的平均收益率为18%，息税前利润的平均标准离差率为0.5，无风险收益率为4%，计算该行业的风险价值系数；
　　(5)计算A、B两家公司的风险收益率和必要收益率；
　　(6)计算A、B两家公司2007年的经营杠杆系数、财务杠杆系数和复合杠杆系数。

在E-R图中，图形包括矩形框、菱形框、椭圆框，其中表示实体联系的是______框。

带下量多，质稀清冷，腰酸如折，小便频数，大便溏薄，舌淡，苔薄白，脉沉迟。治疗的首选方剂是（）

A.内补丸

B.龙胆泻肝汤

C.止带方

D.知柏地黄汤

E.完带汤