在复平面内,点A对应的复数为4+3i,点B对应的复数为-2+i,那么线段AB的中

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问题:

在复平面内,点A对应的复数为4+3i,点B对应的复数为-2+i,那么线段AB的中点C到原点的距离为______.

考点:两点间的距离复数的四则运算
题型:填空题

女性,45岁。是一位有2个孩子的母亲,因头昏、乏力、面色苍白1年来诊。既往有十二指肠球部溃疡20年。化验:RBC2×101。/L,Hb60g/L,白细胞及血小板正常。血清铁蛋白10μg/L,诊断为缺铁性贫血。

下列哪项治疗对本例是不合适的()

A.给予硫酸亚铁口服或肌肉注射右旋糖酐铁

B.口服铁剂期间忌茶

C.加维生素C可促进食物中Fe的吸收

D.多进食猪肝、肉类、禽蛋、香菇等含Fe高的食物

E.给予稀盐酸口服

题型:填空题

在以下各种糖中,属于还原性的糖是()

A.葡萄糖

B.果糖

C.半乳糖

D.麦芽糖

E.蔗糖

题型:填空题

女,2个月,确诊早期先天性梅毒,下述哪项应除外()

A.低热、哭声低、苍白

B.时有黄疸,肝脾大

C.有鼻炎、流涕、鼻塞、出血或脓性分泌物

D.有畏光、流泪

E.有天疱疮样皮肤损害

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It’s a typical Snoopy card: cheerful message, bright colors, though a little yellow and faded now. Though I’ve received fancier, more expensive cards over the years, this is the only one I’ve saved. One summer, it spoke volumes to me.
I received it during the first June I faced as a widow to raise two teenage daughters alone. In all the emotional confusion of this sudden single parent- hood, I was overwhelmed with, of all things, the simplest housework: leaky taps, oil’ changes, even barbecues (烧烤). Those had always been my husband’s jobs. I was embarrassed every time I hit my thumb with a hammer or couldn’t get the lawnmower (割草机) started. My uncertain at- tempts only fueled the fear inside me: How could I be both a father and mother to my girls Clearly, I lacked the tools and skills.
On this particular morning, my girls pushed me into the living room to see something. (I prayed it wasn’t another repair job). The "something" turned out to be an envelope and several wrapped bundles on the carpet. My puzzlement must have been plain as I gazed from the colorful packages to my daughters’ bright faces.
"Go ahead! Open them!" they urged. As I unwrapped the packages, I discovered a small barbecue grill (烧烤架) and all the necessary objects in- eluding a green kitchen glove with a frog pattern on it.
"But why" I asked.
"Happy Father’s Day!" they shouted together.
"Moms don’t get presents on Father’s Day," I protested.
"You forgot to open the card," Jane reminded. I pulled it from the envelope. There sat Snoopy, on top of his dog house, merrily wishing me a Happy Father’s Day. "Because," the girls said, "you’ve been a father and mother to us. Why shouldn’t you be remembered on Father’s Day"
As I fought back tears, I realized they were right. I wanted to be a "professional" dad, who had the latest tools and knew all the tricks of the trade. The girls only wanted a parent they could count on to be there, day after day, performing repeatedly the maintenance tasks of basic care and love.
The girls are grown now, and they still send me Father’s Day cards, but none of those cards means as much to me as that first one. Its simple message told me being a great parent didn’t require any special tools at all--just a willing worker.

What puzzled the mother when her daughters asked her to see something one morning

A. It was not another repair job this time.
B. Both of her daughters looked excited.
C. She got gifts at that time of the year.
D. The bundles on the floor were wrapped.

题型:填空题

为什么将A级绝缘变压器绕组的温升规定为65℃?

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