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问题 选择题

将已发生质壁分离的细胞再置于较低浓度的蔗糖溶液中，观察到质壁分离复原，直到细胞体积稳定下来，这时对恢复原状的细胞来说，可以肯定的情况是[ ]

A．细胞液和外界溶液浓度相同

B．细胞液浓度高于外界溶液浓度

C．水分子不再出入细胞

D．水分子出入细胞处于动态平衡

答案

答案：D

选择题

我们今天肯定武则天，主要是因为[ ]

A、我国历史上唯一的女皇帝

B、临朝听政，开创殿试

C、重用人才，奖励生产

D、在“  贞观之治”和“开元盛世”间起承上启下的作用
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阅读理解
Subways
The Tokyo Metro and Toei Lines
Features: The Tokyo Metro and Toei lines that make up of Tokyo’s huge subway system carry almost 8 million people each day, making it the busiest system in the world. The system is famous for its oshiya-- literally “pusher”--- who push passengers into crowded subway cars so the doors can close. And you think your ride is hell.
The
Moscow Metro
Features: The Moscow Metro has some of the most beautiful stations in the world. The best of them were built during the Stalinist era and feature chandeliers (枝行吊灯)，marble moldings and elaborate murals(精美壁画). With more than 7 million riders a day, keeping all that marble clean has got to be a burden.
The Hong Kong MTR
Features: The Hong Kong MTR has the distinction of being one of the few subway systems in the world that actually turns a profit（利润）. It’s privately owned and uses real estate development along its tracks to increase income and ridership. It also introduced “Octopus cards” that allow people to not only pay their fares electronically, but buy stuff at convenience stores ,supermarkets, restaurants and even parking meters. It’s estimated that 95% of all adults in Hong Kong own an Octopus card.
Shanghai Metro
Features: Shanghai is the third city in China to build a metro system, and it has become the country’s largest in the 12 years since it opened. Shanghai Metro has 142 miles of track and plans to add another 180 miles within five years. By that point, it would be three times larger than Chicago “L”. The system carries about 2.18 million people a day.
The London Metro
Features: Londoners call their subway the Underground, even though 55 percent of it lies above ground. No matter when you’ve got the oldest mass-transit system in the world, you can call it anything you like. Trains started in 1863 and they’ve been running ever since. Some 3 million people ride each day, every one of them remembering to “Mind the gap”
小题1:______ is done with the purpose of making money.
A．The Tokyo Metro and Toei LinesB．The Moscow Metro
C．Shanghai Metro D．The Hong Kong MTR
小题2:We can learn from the passage that Shanghai Metro______.
A．carries the most people each day
B．is the world’s largest
C．may be larger than the Chicago “L” in the future
D．is the busiest in the world
小题3:How many subways carry more than 5 million people per day?
A．2B．3C．4D．5
小题4:What can be inferred from the passage?
A．Shanghai is the third to build a metro system in China, which has become the largest in the world.
B．You’ll feel sick when you travel on the Tokyo Metro and Toei Lines.
C．Londoners call their subway the Underground because 55 percent of it lies above ground.
D．It is estimated that 95% of the population in Hong Kong own an Octopus card
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