小麦和水稻同属于种子植物门同一科的植物,其主要原因是它们的下列哪些器官表现出相同

题型:选择题

问题:

小麦和水稻同属于种子植物门同一科的植物,其主要原因是它们的下列哪些器官表现出相同的特征(  )

A.根、茎

B.叶、花

C.花、果实、种子

D.根、叶

考点:种子植物的结构和功能
题型:选择题

阅读理解。

       My friend Jenny thinks it is very silly to eat too much. She always says she likes a small breakfast. 

  But when I ask her what she eats for breakfast, she says, "Well, I usually start with a glass of orange

  juice. Then I have one or two pieces of bread with butter and a cup of hot chocolate. After that I have

  one or two eggs and some meat. I always have a cup of tea with milk and sugar. Sometimes I have a

  bowl of porridge (麦片粥). I usually finish my breakfast with a cup of coffee. If I'm still a little hungry, I

  often have sandwiches with vegetables. You see, I have a good breakfast every morning. "

       "But how can you call such breakfast small?"

       "I know it is not small. However, that's all I eat. I never eat lunch, and I never have dinner.  If I have

  dinner, I can't sleep. She says with a smile,  "You know, it's stupid to overeat."

根据短文内容判断正(T) 误(F)。

( ) 1. The word "silly" in the first sentence means "clever".

(     ) 2. Jenny never eats lunch.

(     ) 3. Jenny usually has a little breakfast.

( ) 4. Jcnny likes drinking orange juice.

(     ) 5. She has a bad eating habit.

题型:选择题

经测定,由CH3CHO和C6H12组成的混合物中碳的质量分数为a,则此混合物中氧的质量分数为                                 (  )

A.

B.

C.

D.

题型:选择题

维修管理计算机应用软件,是建立在计算机操作系统WINDOWS2000或WINDOWSXP基础上的应用软件,可以不加限制地进行数据交流。()

题型:选择题

精神极度疲惫,神识朦胧,困倦欲睡,肢冷脉微,是因()

A.痰湿困脾

B.脾虚不运

C.清阳不升

D.心肾阳虚

E.痛后正气未复

题型:选择题

不能在砂轮上磨(切)软质工件(如木质和有色金属)。

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