在精神分裂症中，关于高香草酸（HVA）的说法，正确的是（） A.脑室扩大的患者，脑脊
题型：单项选择题 A1/A2型题
问题：
在精神分裂症中，关于高香草酸（HVA）的说法，正确的是（）
A.脑室扩大的患者，脑脊液中HVA含量升高
B.精神分裂症患者血浆HVA含量增高
C.血浆HVA水平与患者精神症状无关
D.慢性精神分裂症患者血浆HVA水平下降
E.精神分裂症患者血浆HVA水平降低
题型：单项选择题 A1/A2型题
Riding a London subway, a person from China will notice one major difference; in London, people do not look at each other. In fact, eye contact is avoided at all time. That's not rudeness— people are just too busy to bother looking.
Busy doing what, you ask? Well, they're certainly not using the time for a moment of quiet reflection（沉思）.Nor are they reading a book. New techology has replaced quiet habits. Today the only acceptable form of book on the London Underground is an e-book.
Apple must earn a fortune from London commuters（乘车上下班的人）. Since the launch of the iPhone in 2007, over 40,000-yes, that's 40,000-"apps"(programs downloaded for the iPhone)have been designed.
Commuters love them because they are the perfect time-filler. One "app"，called iShoot, is a game that features tanks. Another one, Tube Exits, tells passengers where to sit on the train to be closest to the exit of their destination（目的地）. ISteam clouds the iPhone screen when you breathe into the microphone. You can then write in the "steam" on your phone screen.
For those without an iPhone, another Apple product, the iPod, may be the distraction（消遣）of choice. It's not just teenagers who "plug in" to their music-iPods are a popular 
way to pass the time for all ages.
And if games, e-books and music aren't enough to keep you occupied. Then perhaps you would prefer a film? The development of palm（掌上）DVD technology means many commuters watch their favorite TV show or film on the way to work. Wi
th all this distraction, it's amazing that people still remember to get off the train.
小题1:People in London do not make eye contact on the subway because they are busy .
A．going to work
B．reading books
C．thinking private thoughts
D．playing games, reading e-books, listening to music or watching films小题2:In Paragraph 4, the underlined word “them” refers to “ ”.
A．habits
B．“apps”
C．iPhones
D．films小题3:Those who like war games can download to their iPhones.
A．iShoot
B．Tube Exits
C．iSteam
D．i
Pod小题4:The underlined word "occupied" in the last paragraph probably means .
A．delighted
B．busy
C．amused
D．controlled小题5:The article tells us that .
A．London commuters are unfriendly to strangers
B．Apple has earned a lot of money from selling 40,000 apps
C．technology is changing the way London commuters spend their traveling time
D．with all the new time-fillers, London commuters often forget to get off the train.