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问题 选择题

下列属于昆虫的是（　　）

A．蜘蛛

B．沼虾

C．蜻蜓

D．蜈蚣

答案

昆虫的身体分为头、胸、腹三部分，触角一对，复眼一对，三对足，一般有两对翅，如蝴蝶、蜻蜓和蝗虫等．而虾用鳃呼吸，身体分为头胸部和腹部，有2对触角．头胸部具发达的头胸甲．属于甲壳纲，蜘蛛、蜈蚣和昆虫等都具有身体有许多体节构成，并且分部，足和触角也分节，体表有外骨骼等特征都属于节肢动物．但是蜘蛛、蜈蚣不具备昆虫的特征．

故选：C

填空题

根据句意及首字母提示，补全下面的信。

Dear Sally，

     How are you? I'm very happy because I have a good p__1__friend. He is a Chinese boy and his name is Li Ming. He is thirteen y  2   old. He can s   3      

good English. He has a sister and a brother. He likes sports but he doesn't like football. He often sends me some p    4    of his family. He is h  5  dinner with his family in the first picture. He is p_6        basketball with his brother in the

park in the second picture. In the last picture, Li Ming and his brother arel  7   on the beach. Their mother and sister are sailing a boat.Their father is fishing. Li Ming is a g  8   boy and he has a happy f     9      .Do you have any Chinese

friends?

     Please w  10  to me.

                                                                                                             Yours，

                                                                                                             Amy
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单项选择题

烧伤最常见的并发症是（）

A.周身感染

B.呼吸衰竭

C.休克

D.急性肾功衰竭

E.应激性溃疡
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