题干

(2009年滨州模拟)抽除叶片中的空气后,将叶片放入盛有新制的冷开水的三角瓶中,研究环境因子对光合作用的影响。下表4组中可以说明CO2对光合作用影响的是(  )
1
光照
20℃水浴
新制的冷开水
2
厚纸遮光
20℃水浴
加少许NaHCO3粉末
3
光照
冰水降温
加少许NaHCO3粉末
4
光照
20℃水浴
加少许NaHCO3粉末

A:1号

B:2号和4号

C:1号和4号

D:3号和4号

上一题 下一题 0.0难度 选择题 更新时间:2017-03-02 07:00:14

答案(点此获取答案解析)

C

同类题3

根据短文理解,选择正确答案。

Top 5 Must See Places in Beijing

    Beijing is an old capital city with a lot of tourists attractions. What is the most representative place in Beijing? The answers are various. Here are the Top 5 Must See Places in Beijing.

1) Forbidden City

    The Forbidden City is the ideal place for you to begin your exploration of Beijing. Make sure to wear comfortable shoes as you have to walk a lot! A multilingual guide recorder is recommended, as it can tell you the stories behind the palace.

Opening Hour: 8:30-17:00

Entrance Fee: RMB 60

2) Tian'anmen Square

    Lying in the heart of Beijing City, it is the place for massive parades and gathering. It boasts of the largest square of such kind in the world. At sunrise and sunset the raising and lowering ceremony of the Chinese National Flag is well worth seeing.

Ticket fees: Free

Opening Time: Whole Day

3) Great Wall

    Most of the sections of the Great Wall in Beijing are well-preserved, and the most famous section is Badaling. For the Great Wall hiking, get ready for strong footwear. For hot weather, please also prepare sunblock, sunglasses and water.

Badaling Great Wall:

Ticket Fees: RMB40 (Nov. 01 to Mar. 31); RMB 45 (Apr. 01 to Oct. 31)

Open Hours: 6:40 to 18:30

4) Summer Palace

    Regarded as the largest imperial garden in China, the Summer Palace is in fact a park-styled royal retreat. With masterly design and artistic architecture integrating the highlight of Chinese garden arts, it has earned a title of "Royal Garden Museum".

Open Time: 6:30-20:30

Ticket Fee: RMB 40 (low season) / RMB 50 (peak season during the holidays)

5) Temple of Heaven

    The Temple of Heaven worked as sacrificial compound buildings for the Ming and Qing emperors. What's the intriguing by-production of the temple is that if you enter the Temple of Heaven in the early morning, you can find many people doing all types of Kungfu, Taiji, dancing and other morning exercises.

Open Time: 6:00-21:00

Ticket Fee: RMB 35

同类题4

阅读下面有关张学良的材料,回答问题。

  张学良(1901年—2001年),字汉卿,奉系军阀首领张作霖的长子,人称“少帅”。

“皇姑屯事件”之后,张学良继任为东北保安军总司令,拒绝日本人的拉拢,坚持“东北易帜”,为祖国统一和民族团结做出了贡献。后任中华民国陆海空军副司令,陆军一级上将。1931年9月18日,日本关东军发动震惊中外的“九一八”事变,张学良执行蒋介石的不抵抗政策,20万东北军不战自退。不到半年,东三省沦亡。

  1935年,张学良任西北剿总副司令,到陕西“剿共”。此时,日本侵华日亟.国民政府一再妥协。中共驻共产国际代表发表《为抗日救国告全体同胞书》(简称“八一宣言”),号召停止内战,一致抗日。1935年12月9日,在***领导下,北平(北京)学生举行了抗日救国示威游行,掀起了全国抗日运动的新高潮,全国要求停止内战,实行抗日的呼声日益高涨。在抗日民族统一战线政策的感召下,张学良、杨虎城同红军停战和解。1936年12月,蒋介石到西安督战,威逼张、杨执行“剿共”计划。张、杨多次劝说蒋介石停止内战、联共抗日都遭到训斥,12月12日,张学良与杨虎城扣押蒋介石,实行“兵谏”,逼蒋抗日,发动了震惊中外的“西安事变”。

  西安事变后,张学良遭蒋介石父子长期软禁。1990年恢复人身自由,1995年起离台侨居美国夏威夷,2001年10月病逝于檀香山,享年101岁。

——摘编自《中国近代史》