
由于雾霾等环境的恶化,人们逐渐接受了温室栽种的各种蔬菜。下图一是光照强度对温室中不同叶龄的莴苣叶片吸收CO2量的影响;图二是图一C点时某叶肉细胞内发生的变化,其中A~D表示生理过程的不同阶段,a~f表示物质。

(1)分析图一中 15天龄苗,限制A点的因素主要有 ,若一天光照时间为12小时(昼夜温度恒定),则白天的光照强度必须为 Klx该叶片才能正常生长;研究发现,D点后,光照强度增强会使叶片的气孔开度变小,影响了 阶段,从而使光合作用减弱。
(2)从图二看出,A~D中只能发生在生物膜上的过程是 (填字母);在a~f中,属于相同物质的是 (填字母)。

Today it is common to see people who walk about with colored wires hanging from their ears wherever they go. They move about in their personal bubbles, sometimes unaware of what’s happening around them. 36 Outside life is shut out. So are you one of “them”?
For me, walking around in my own personal bubble is perfect. 37 What’s even better, wearing earphones seems to give a signal to people which says: “I’m not available for chatting at the moment!”
Suppose you’re at work and about to make an incredible breakthrough, but a colleague suddenly turns up. At this precise moment, the slightest disturbance would break your concentration. 38 Once again, those wires hanging from your ears would be sure to give that “Go away!” signal.
39 It’s probably part of the growing up stage when they just want to ignore their whole family. While their mothers give them lectures about why they should do their homework, they can just turn up the volume(声音) on their MP3 player, smile, and say “Yes, Mum.” Problem solved.
Pretty soon, not only will we have pretty colored wires hanging from our ears—but also our brains will be directly plugged into some new high-tech instrument. We’ll be in a virtual(虚拟) world, communicating with everyone else, or choosing not to, as we like. In this world, we will all be permanently plugged in. 40 And they are changing our social habits along the way.
In the end, there is a thin line between using technology as a tool for making life better and being a slave to it! It’s so strange—suddenly, I don’t feel like wearing my earphones any more!
A. Listening to music through earphones is the perfect way to ignore such interruptions.
B. I also have wires hanging from my ears.
C. They walk around in their own spaces, with their personal “digital noise reduction systems.”
D. I don’t have to deal with the noise from the environment.
E. After all, I am listening to my favorite music and would rather not be disturbed.
F. Our instruments are changing quickly.
G. In the home situation, teenagers love these wires.
分离CH3COOH和CH3COOC2H5混合液
验证NH4NO3晶体溶于水的热效应
蒸发FeCl3溶液得到FeCl3固体
验证C、Cl、Si的非金属性强弱
,则亚当·斯密在《国富论》中写道:“当欧亚初通贸易时,亚洲各国尤其是中国与印度的金银比价,比欧洲高得多……在中国及其他大部分印度市场上,纯银与纯金的比价通常为十对一,至多也不过十二对一,而在欧洲则为十四或十五对一。”根据材料以下说法错误的是
A.白银的流通促进世界市场的发展
B.世界白银流入中国并广泛流通使用
C.大量白银流入促使中国出现价格革命
D.白银成为当时各大陆通商的主要商品之一
改错:Ten years ago, my hometown is a small and poor city with few factories. And the citizens had few choice on transportation. However, nowadays my hometown has taken on brand new look with rapid development of culture and economy. The citizens' living conditions have been greatly improve and their lifestyles are different from in the past. Shop online has become popular. When they comes to transportation, private cars have become a common way of traveling beside public transportation. The best change is which all the people are living a hopeful life with confident.