火柴梗和烟头应在（），放在烟灰缸内。A、完全熄灭后 B、使用后 C、燃烧时 D、未点

LONDON, England（CNN）--- The youngest person to sail solo around the world returned home Thursday from his 30,000-mile, 282-day ocean journey.

Mike Perham, 17, sailed into Lizard Point in Cornwall, the southernmost point in Britain, at 9:47 a.m., his race team said.

“It feels absolutely brilliant,” Mike told CNN by phone hours before crossing the finish line. “I'm really, really excited to be going across the line at last. It doesn't feel like long since I crossed it first.”

Mike set off on his round-the-world trip on November 18, 2008. He has been sailing his yacht single-handedly, though a support team has been sailing next to him along the way.

The teen has now achieved the title of Youngest Sailor to Circumnavigate the Globe Solo, according to the Guinness World Records.

Mike learned how to sail when he was seven years old from his father, Peter and at age 14, he sailed across the Atlantic alone.

The teenager's school --- which Mike describes as “highly supportive” of his trip --- has redesigned his coursework to fit in with his trip. It also gave him some coursework to do during “quiet moments,” according to Mike's Web site.

There haven't been many of those quiet moments. Repeated autopilot failures forced him to stop for repairs in Portugal, the Canary Islands, South Africa, and twice in Australia, according to his Web site.

Bad weather in the Southern Ocean --- between Australia and Antarctica --- forced Mike to battle 50ft waves and 57 mph winds. He said at one point, a “freak wave” picked up the boat and turned it on its side.

“My feet were on the ceiling at the time,” he told CNN. “That was a really hairy moment, and I was certainly thinking, ‘Why am I here?’ But we took the sails off and the day after I thought, ‘This is brilliant!’”

Mike describes his father as his biggest hero, always supportive of what he wanted to achieve. Peter Perham said he wasn't too worried about his son facing dangerous situations at sea, as long as he knew what to do and stayed safe.

49. Mike Perham returned to Britain in ________.

A. August      B. November      C. October          D. September 

50. Mike Perham is ________ that went on the round-the-world trip in the world up till now.

A. the first       B. the bravest     C. the luckiest     D. the youngest

51. We can infer from the passage that ________.

A. the English school is the same as ours

B. the English school gives students a lot of course work

C. the English school has a humane management

D. the English school doesn’t care for students

52. The passage mainly tells us ________.

A. Mike’s exciting sail trip around the globe

B. how Mike’s father taught him to sail a boat

C. why CNN wanted to report the news to the public

D. the introduction of the Guinness World Records

钢筋在加工过程中，当发现脆断，焊接性能不良或力学性能显著不正常等现象时，应对该批钢筋进行( )检验或其他专项检验。

A．化学成分
B．除锈
C．折叠
D．外观质量

施工企业的广告费应该计入( )。

A．现场经费
B．企业管理费
C．其他直接费
D．其他费用

气腹时肝浊音界变化是（）

A.肝浊音界扩大

B.肝浊音界缩小或消失

C.肝浊音界不变

D.肝浊音界下移

E.肝浊音界上移