下列属于生态系统的是( ) A.黄河中的鲤鱼 B.洞庭湖中的所有生物 C.内蒙古

题型:选择题

问题:

下列属于生态系统的是(  )

A.黄河中的鲤鱼

B.洞庭湖中的所有生物

C.内蒙古草原上的全部羊

D.泰山林区

考点:生态系统的概念和组成
题型:选择题

某小学校160名学生,在饭店订做课间餐,学生在当天上午8:50~9:00食用,大约3小时后,其中有79人出现头晕、腹痛、腹泻、恶心、呕吐。腹泻主要是黄绿色水样便,一日数次至十余次。腹痛多在上腹部,伴有压痛,体温一般在38℃~40℃()

其发病可能的原因是

A.蛋类被污染

B.家畜、家禽肉类被污染

C.奶类被污染

D.熟制品被污染

E.以上都是

题型:选择题

根据短文内容和首字母提示,在下文空格处填入适当的词使短文完整。在答题卡标有题号的横线上,完整写出空缺处所填单词的正确形式。(每空一词)

IF you are a TV fan, you can’t have missed the popular sitcom Home With Kids (《家有儿女》). The l__小题1:__ characters, 17-year-old Xia Xue and 14-year-old LiuXing can r__小题2:__ us of our own behavior or our classmates. We love the  two teenagers, but are they good students? And what m__小题3:__ a good student? “A good student should have good g__小题4:_. Based on their school reports, clever and diligent (勤奋的) Xia Xue is a much b_小题5:__ student than her brother, Liu Xing,” says Wu Hao, 16, in Inner Mongolia. “The boy should work harder at s__ 小题6:__----- since our duty as students is to study well,”

It is generally accepted that getting good scores is i_小题7:__for a student. So to some, being, a good student means getting good marks in your class or even your school. H __小题8:__, Wu also admits that a student’s personality is more important in being a role model student. Many teenagers do not think it is f_小题9:_to judge students by their grades. Take Liu Xing for example. He is bright, good at computers and does everything else well like any other teenager e__小题10:__ studying.

题型:选择题

热带草原的代表植物是(  )

A.桦树

B.针叶林

C.松树

D.猴面包树

题型:选择题

表内科目分为()。

题型:选择题

哪项对蜘蛛痣描述不当( )。

A.常分布于面、颈、手背、前胸等处
B.用棉签压蜘蛛痣的中心无变化
C.皮肤小动脉末端扩张
D.大小不一
E.常见于肝硬化、慢性肝炎

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