疱疹性口炎病原体是（）。 A.HSV B.牙龈卟啉单胞菌菌 C.变形链球球菌 D.柯

阅读下面短文，从短文后所给各题的四个选项中，选择最佳选项。

       Once a circle lost a piece of its own. The circle wanted to be whole, so it went around looking for its

missing piece. But because it was not complete, it could only roll (滚动) very slowly. It enjoyed the flowers and

the sunshine along the way. It talked with worms. It found lots of different pieces, but none of them fit. So it

left them all by the side of the road and kept on looking for the missing piece. Then one day the circle found a

piece that fit perfectly (完美). The circle put the missing piece into itself. It could be whole with nothing

missing. It was so happy and began to roll. As it was a perfect circle, it could roll very fast, too fast to see

flowers or talk to worms. It realized how different the world was when it rolled so quickly. It felt so sad that it

stopped, left its found piece by the side of the road and rolled away slowly. 

       Sometimes we are perfect when we lose something. A man who has everything is a poor man in some

ways. He will never have hopes, dreams or something better. He will never know someone is loving him or

someone is giving him something he has always wanted or never had.

       We couldn't be perfect, but we must be brave enough to love, strong enough to forgive, kind enough to

share happiness with others and clever enough to know there is enough love around us and then we can always

live a wonderful time in our lives.

1. The circle rolled very slowly because it ________. [ ]

A. spent much time talking to worms

B. wanted to enjoy the sunshine

C. was looking for its missing piece

D. lost a piece of its own

2. Why did the circle stop when it rolled quickly? Because it ________. [ ]

A. wanted to enjoy the world

B. found a different world

C. wanted to look for another missing piece

D. thought the world changed so quickly

3. The story mainly tells us that _______. [ ]

A. nobody loves us if we give nothing

B. a man who has everything is the happiest

C. losing something may not be a bad thing sometimes

D. we are not whole when we lose something

给此患儿立即开始的治疗中，哪一项是不正确的

A．补液扩容

B．多巴胺

C．呋塞米(速尿)

D．碱性溶液

E．糖皮质激素和抗生素

载流导体在磁场中所受到磁场力的方向由（）确定。

A、右手定则

B、右手螺旋定则

C、左手定则

D、欧姆定律

无极绳绞车司机交班准备：（），准备交班。

A.做好记录

B.等待下班

C.清扫现场

D.现场检查

集装的目的在于满足用户大型化的需要；分装的目的在于机动灵活，便于送达。( )