问题 选择题

以下说法不正确的是:

A.绿色开花植物的花、果实和种子与植物的生殖有关,属于植物的生殖器官

B.绿色开花植物的一生中,同时具有六种器官

C.胃主要由肌肉构成,但胃壁除了肌肉组织外,还有其他组织,故胃是一个器官

D.人类的受精卵经细胞的分裂和分化,所产生的细胞内染色体数量是一样的

答案

答案:B

题目分析:器官是指由不同的组织按照一定的次序结合在一起构成的行使一定功能的结构,绿色开花植物是由根、茎、叶、花、果实、种子六大器官组成的.根、茎、叶为营养器官,花、果实、种子为生殖器官.因此,A不符合题意,B符合题意。胃的内表面由上皮细胞构成,属于上皮组织.胃壁里面主要是肌肉组织,能收缩和舒张促进胃的蠕动来消化食物.整个的胃布满了丰富的血管和神经,血管里的血液属于结缔组织,神经属于神经组织.因此胃是由上皮组织、肌肉组织、结缔组织和神经组织按照一定的次序结合在一起构成的一个器官.C不符合题意。在细胞分裂过程中,染色体复制加倍,随着分裂的进行,染色体分成形态和数目相同的两份,分别进入两个新细胞中.这样就保证了通过细胞分裂产生的新细胞与原细胞所含的遗传物质相同.因此同一个受精卵经细胞的分裂和分化,所产生的细胞内的染色体数量是一样.所以题干D的说法正确.故选:B

阅读理解

阅读理解。

     It's reported that a company called MicroCHIPS has developed awirelessly controlled device

(装置). The device is put under the skinand can supply a drug directly into the patient's body.

People give the name"microchips"to it.

     Microchips bring good news to patients with long-term(长期的) illnesses, for example,

Osteoporosis(骨质疏松症). People with Osteoporos is have to get daily injections(注射) of

medicine. One type of treatment requires injections for two years. Many patients stop taking the

medicine because of the pain and stress of theinfections. However, microchips can deal with it.

Doctors will program the device before putting it under the skin, and the device has the ability to

release(释放) a dose (剂量) at a given time, every single day. One microchip can hold a full year's

worth of medicine. Microchips may one day free (使…… 摆脱) people from having toremember

to take their medicine, or get injections. The device may also be useful in treating other long-term

diseases, including heartdisease, cancer and even AIDS.

1. What is the passage mainly about?

A. It introduces the company MicroCHIPS.

B. It introduces a new wirelessly controlled device called"microchips".

C. It introduces some common long-tern diseases.

D. It's about how the device called"microchips"works.

2. According to the passage, why do many patients stop getting injections?

A. Because of the pain and stress of the injections.

B. Because they are too lazy.

C. Because they like taking pills(药丸).

D. Because they are waiting for the new device. 

3. According to how the device works, which of the following is the correct order?

① Put the device under the skin.

② The device releases a dose at a given time.

③ Doctors program it.

A. ①②③

B. ②③①

C. ③①②

D. ③②①

单项选择题