[简答题]The subtle genetic variations in people could contribute to ______.

[简答题]The subtle genetic variations in people could contribute to ______.

[单项选择]Conversation TwoWhat does the man say people could do on the moon
A. Build hotels．
B. Do space－walking．
C. Prepare for trips to Mars．

[填空题]A Frenchman thought that in cities people could feel free and live an easy life.

[简答题]Event How do you think people could be encouraged to walk more

[单项选择]Very few people could understand the lecture the professor delivered because its subject was very ________.
A. intriguing
B. indefinite
C. obscure
D. dubious

[填空题]People could eat more cocoa-rich products such as dark chocolate but not drink tea if they want to lower their blood pressure, German researchers reported Monday.
A team of researchers from the University Hospital of Cologne analyzed data from (36) studies that looked at the benefits of tea and cocoa. They found eating foods (37) in cocoa resulted in lower blood pressure levels.
Their report (38) of exactly 10 studies on cocoa with a total of 173 (39) , a third of whom had high blood pressure and were (40) for a two-week period, and five tea studies with 343 people for a four-week period.
The fall in blood pressure (41) to cocoa could be expected to reduce the risk of strokes and heart (42) by 10-20 percent, the report said.
The benefits are believed to come from certain compounds, (43) Dr. Dirk Taubert, a leading author of the report.
While tea and cocoa are both rich in such com

[单项选择]

Long time ago, the ancient people could not travel to any far away places for they had no vehicle to carry them across the wide oceans, deep valleys, long rivers or high mountains.
Nowadays people take advantage of steamships, trains, airplanes and modern bridges. Airplanes can carry us to the far countries in a short time; steamships can travel across the wide oceans. It is convenient to the modern people.
Travelling is a good idea to us because we can get more knowledge, such as the customs, the geography of other countries. And people could travel among the different countries in the world. For it is easy to travel from the land by trains, or from the sea by ships.
We learnt that the Italian who made the world large was Mr. Columbus. He was a brave man. Up to the middle of the 15th century, the people were afraid of traveling because they believed it was a dangerous thing.
There is a saying in China, which is "Travelling for thousands is be
A. it can bring us more knowledge
B. it can make us rich
C. they have too much money
D. it is a good idea