试题与答案

在防变育种中,经过诱变处理的种子或营养器官所长成的植株或直接处理的植株称为()。 A

题型:单项选择题

题目:

在防变育种中,经过诱变处理的种子或营养器官所长成的植株或直接处理的植株称为()。

A.诱变一代(M1)

B.诱变二代(M2

C.诱变三代(M3)

D.诱变四代(M4)

答案:

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In 2007, the first solar electric boat crossed the Atlantic Ocean. Now a Swiss group wants to cover that distance and keep going, circling the globe on nothing but the sun’s power for the first time.

The team of engineers and scientists has started the building of its 98-foot long boat, named Planet Solar, in Kiel Germany. The boat’s power will come from the 5,000 square feet of solar panels(电池板), about the size of two tennis courts, covering its broad deck. When the sun is shining bright above, they will turn 23 percent of the sun’s rays to energy — six percent more than average solar panels.

Even though batteries aboard Planet Solar can store enough energy to power it through up to three days of cloudy weather, the sailors will try to avoid clouds: constant communication with the French meteorological institute, Meteo France, will help the sailors stay with the sunny course.

The $11.5 million project, which is led by Raphael Domjan, should be ready for its first voyage next summer. The solar electric boat will warm up in European waters, and attempt to deal with traveling around the globe in spring 2011. At a maximum speed of 16 mph, Planet Solar will be the fastest solar electric boat. The team expects to finish the first leg of its journey across the Atlantic in about two weeks, compared to the six months the solar boat took back in 2007.

If sailing by sun becomes practical, it would be a return to the green boating methods of the days of Christopher Columbus. Those long-ago voyages relied only on a different type of renewable energy: wind. And, if wind-powered sails could be combined with solar panels, we might really pick up the boating speed.

57. Which of the following is NOT true about Planet Solar?

A. Its deck is covered by solar panels.

B. It will be the fastest solar electric boat.

C. It is 98-foot long and is to be made in Germany.

D. It can turn 17 percent of the sun’s rays into energy.

58. Planet Solar will be likely to __________ in continuous rainy weather.

A. continue traveling forward

B. ask the local weather station for help

C. stop to wait for the weather to clear up

D. turn to Meteo France for help to choose the sunny course

59. What can be inferred from the passage?

A. Sailing by solar energy has not been widely used in today’s green boating.

B. Planet Solar will be the first boat to circle the globe using solar energy in 2011.

C. The solar panels in Planet Solar can turn more sunlight to energy than average ones.

D. Batteries aboard Planet Solar can be consumed for at most three days of cloudy weather.

60. What is the main idea of the passage?

A. Planet Solar uses solar energy all over the world.

B. Planet Solar aims to be the first to circle the globe.

C. Planet Solar collects a different kind of renewable energy.

D. Planet Solar combines traditional methods with modern technology.

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