下图是某火山在一次喷发后火山灰厚度的分布图，图中a>b>c。读图完成1~2题。
1、盛行风会影响火山灰的分布状况，据此推测此次喷发时间很可能是当地的[ ]
A、春季
B、夏季
C、秋季
D、冬季
2、大规模火山喷发所产生的火山灰若在大气层中长期滞留，除会对飞行安全造成威胁外，还包括[ ]
A、全球沙尘暴肆虐
B、地面气温可能会下降
C、"温室效应"加剧
D、火山灰酸雨导致白内障
1、D
2、B
Frank laughed as he tried to tear at the wrapping paper on his birthday present. He was so ! Finally, he would have the coolest pair of name-brand basketball shoes. All the guys on his team were wearing the name-brand shoes of a popular basketball _, Chuck Hart. While Hart was for his poor sportsmanship and infamous , he was a great player. In fact, Frank wasn't thinking about Hart’s behavior; he had only expected to see Hart’s on the side of the box. The first indication that something was came as he tore away the last piece of paper. Not Hart’s. The new shoes were the name-brand of another player, Robert Ryann, who was for his amazing work in the community. Frank’s hands ; his heart stopped. It wasn't that the Ryann shoes weren’t nice, but what would his friends think ? They were the wrong shoes and Frank would be by the other players. When he looked up into his dad’s eyes, however, Frank decided he not tell him. “Thanks, Dad. I was really hoping for shoes,” Frank said as he pulled the shoes out of the box. The next morning his dad drove him to school. When they in front of his destination, Frank slowly opened the car door. Just then, his dad stopped him. “Hey, Frank, wait a minute, look…” his dad said ,“Frank, I know those aren’t the shoes you had hoped for, but I saw the names of the two guys and made a（n） . The guy whose name is on those shoes,” he said, pointing down at Frank’s feet, “is someone I . Do you know how often Ryann has found himself in ?” “No,” Frank said. “Never. He’s never talked back to his coach or started a fight, and he’s a team player. You could have acted like a (n) when you didn’t get the shoes you wanted, Frank , you were polite and made the best of it. You have such a good , like the guy whose name is on these shoes. I’m hoping that someday, your name will be on the coolest pair of shoes I’ll ever see.” When Frank looked down at his feet, he saw the shoes . His dad had used his mind and heart to give the son a thoughtful .
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