阅读理解。
A pioneering headteacher is calling for all high schools to follow his lead and start classes at 11 am,
allowing teenagers two hours extra in bed.
Dr Paul Kelley, head of Monkseaton Community High School in North Tyneside, said it would mean
the end of sleeping in lessons before lunch, after experiments showed teenagers could have different body
clocks from adults and younger children.
Russell Foster, an Oxford professor of neuroscience (神经学), tested the memory of 200 Monkseaton
pupils at 9 am and 2 pm using pairs of words, and discovered a 9% improvement in the afternoon. Students
correctly identified 51% of word pairs in the later session, compared with 42 % in the morning. Tayler
MeCullough, 15, one of the test subjects, said the majority of students would welcome the extra hours in
bed. "I'm extremely hard to get up in the morning. One or two people like to get to school early, but most
of us would be up for going in later. I'm sure it would make a big difference to our learning ability."
Kelley is adamant that a change of school timetable will have a meaningful effect on exam performance.
He wants his school's governors to approve his plan and put the new timetable in place before the opening
of Monkseaton's new school building, the most technologically advanced in the country, in September.
Kelley hopes his latest idea will be just as successful. "We have to be practical. But this proves that, by
starting later, children's learning improves, as does their health." Foster said, "This is preliminary (初步的)
data, but what's exciting is that it matches more detailed studies carried out in Canada and the US. Teenagers
get up late not because they are lazy but because they are biologically programmed to do so."
1. How many professors are mentioned in the passage?
A. One.
B. Two.
C. Three.
D. Four.
2. According to Russell Foster's research, _____.
A. the students tested had very good memories
B. the students tested did better jobs in the afternoon
C. 42% of the students tested could do very good jobs
D. 51% of the students tested could master 9% of words
3. What does the underlined word "adamant" in the fourth paragraph mean?
A. Angry.
B. Absorbed.
C. Adaptable.
D. Determined.
4. Foster's opinion on teenagers' getting up late is that _____.
A. teenagers are practical
B. teenagers are lazy-bones
C. it's based on their body development
D. it's good for their learning and health
2SO3，△H<0的反应，下列说法中正确的是[ ]
，才能引起上述化学反应的平衡状态发生移动 