畏光、流泪、暗光视物不清是缺乏（）。 A.维生素C B.维生素A _爱下问搜题

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问题单项选择题 B1型题

畏光、流泪、暗光视物不清是缺乏（）。

A.维生素C

B.维生素A

C.维生素B₂

D.维生素B₁

E.维生素D

答案

参考答案：B

解析：

1.维生素A构成视觉细胞内的感光物质。缺乏维生素A时可降低眼暗适应能力，怕光、流泪、暗光视物不清，严重时可致夜盲。 2.维生素B₂缺乏常主要表现为口腔与生殖器官的炎症变化，故有“口腔-生殖器综合征”之称。 3.维生素D的最主要功能是提高血浆钙和磷的水平到超饱和的程度，以适应骨骼矿物化的需要，维生素D缺乏使成熟骨钙化不全，表现为骨质软化症，特别是妊娠和哺乳妇女及老年人容易发生，严重时骨骼脱钙引起骨质疏松，该孕妇骨盆变形、牙齿松动是缺乏维生素D。

完形填空

完形填空（每小题1.5分，共30分）
It was a normal summer night, humidity（潮湿）hung in the thick air. The only sound was my sister’s heavy __36__ from the bed next to me.
I couldn’t go to _37__, partly because of my cold and partly because of my __38__ for the next day. My mum had said that tomorrow was going to be a __39__ .
Sweat stuck to my aching body. Finally, I gathered enough __40__ to sit up. I looked out of my small window into the night. There was a big bright __41__ hanging in the sky, giving off a magic glow.
My sister turned over as though she was as light as air. Why could she sleep soundly? Why wasn’t she __42__ too? Did she know about tomorrow?
I couldn’t stand the __43__ anymore, so I did what I always do to make myself feel better. I went to the __44__ and picked up my toothbrush and toothpaste. Pouring the red paste onto the brush, I cleaned back and forth, up and down.
Then I walked downstairs to look for some __45__of movement, some life. Gladiator, my cat, __46__ me as he meowed（猫叫）his sad song. He was on the old orange couch （长沙发）, sitting up on his front legs, 47 something to happen. He looked at me as if to say, “I’m __48__, pet me. I need a good hug.” Even the couch begged me to sit on it.
In one movement I settled down onto the soft 49 . This couch represented my birth, my parents’ marriage, and hundreds of other little __50__.
As I held Gladiator, my heart started beating heavily. My mind was __51__ with questions: What’s life? Am I really alive? Are you listening to me? Every time I moved my hand down Gladiator’s body, I had a __52__ thought; each touch sang a different song.
I forgot all about the __53__ and the next day’s surprise. The __54__ was so full of warmth and silence that I sank into its arms. Falling asleep with the big cat in my arms, I felt all my worries __55__ move away.

A．interpretations

C．arrangements

D．expectations

A．sitting-room

D．waiting-room

A．begging for

C．admiring for

D．waiting for

单项选择题

根据《保险营销员管理规定》，保险公司委托保险营销员从事保险营销活动，应当（）。

A.与保险营销员达成口头委托协议

B.与保险营销员签订书面委托协议

C.与中国保监会达成口头委托协议

D.与中国保监会签订书面委托协议