26 Jun. A bird's-eye view of the natural world： learning about forests from aircraft Dr David Coomes, Head of Group, Forest Ecology and Conservation, Department of Plant Sciences

24 Jul. Extreme green： plant adaptations(适应)to the world's most difficult environments

Dr Sam Brockington, Head of Group, Molecular Systematics & Evolution, Department of Plant

Sciences

Science on Sunday talks last 30 minutes and are free (as long as you have paid to get into the Garden); there is no need to book; just drop in to the Classroom at the Brookside Gate at 11 am (each talk repeated at 2 pm).

21.Who is the director of the Cambridge University Botanic Garden?

A. Devin O'Connor. B. Beverley Glover. C. David Coomes. D. Siobhan Braybrook.

22. What is the talk about in April?

A. Tricky light. B. Leaf shape. C. Plant patterns. D. Plant adaptations.

23. Where is the text probably taken from?

A. A monthly review. B. A science report. C. A gardening guide. D. A local notice.

The search engine Google celebrated on Thursday the 110th birthday of the first Native Ameri-can woman engineer. Google honored Mary Ross with a special Google Doodle(谷歌图标) on its homepage. Her work is considered important to the early stages of the age of space travel.

Ross was born on August 9, 1908, in the state of Oklahoma. She showed special abilities in math and science from an early age. As a student, she developed an interest in aviation, or the practice of flying aircraft. She went on to earn a master's degree in mathematics from Colorado State Teachers College, now called the University of Northern Colorado.

During World War II，Ross began working for the Lockheed Aircraft Corporation as a mathema-tician. She earned a special certification in the field from the University of California in 1949. Ross was later chosen to join Lockheed's top-secret Skunk Works team that worked on aircraft designs. The name refers to a group that is permitted to work independently on advanced projects. She was the only female engineer among the team's 40 members. Early on, she researched defense systems. By the late 1950s, her work centered on satellites and a series of space rockets A genda. The rockets were extremely important in the 1960s during the Apollo moon program.

Ross also helped develop early design ideas for space travel between planets, including flyby space flights to study Venus and Mars. Ross retired from Lockheed in 1973.But she continued to give talks at high schools and colleges to encourage more women and Native Americans to study engineering. She died in 2008,a few months before her 100th birthday.

Many celebrated Ross' life on social media. Twitter user Aaron Perez, for example, wrote："Mary Ross was an engineer who pioneered in the field of satellites. I never would have known if it wasn't for the doodle. Women engineers deserve more recognition."

24.Why did Google celebrate Mary Ross' 110th birthday?

A.She invented a new flying aircraft.

B.She had been a great designer ever.

C.She contributed a lot to.space travel.

D.She got a master's degree in mathematics.

25.What did Mary Ross do in the middle of 20th century?

A.She worked on Agenda.

B.She gave talks at high schools.