以股票为标的物的看涨期权与认股权证相比，下列表述中不正确的是（）。
A.看涨期权执行时，其股票来自二级市场，而当认股权执行时，股票是新发股票
B.认股权证的执行会稀释每股收益和股价，看涨期权不存在稀释问题
C.看涨期权时间短，认股权证期限长
D.看涨期权具有选择权，认股权证到期要行权
参考答案：D
解析：
看涨期权和认股权证在到期前均可以选择执行或不执行，具有选择权。
One of the most difficult things for children to deal with when moving to a new town is leaving their friends and making new ones. We once moved and one of our new neighbors told us about a summer camp at the Recreation Center all the kids went to. My husband and I looked into it and we found it was unbelievably cheap. I had the kids sign up (报名) the next day so that they could know more kids there. Another thing we did was to have them sign up for sports when school started. They were happy to be on teams with new friends they made. This also gave me a chance to meet new people and from them I sometimes got some useful ideas for my new books. If you’re just moving to a new house in the same city you live in now, it won’t really be a problem unless your kids are changing schools. If they are, it is a great idea to have them take the address book to school. Thus, your children won’t feel “lost” without their old friends. If you’re able to, over the summer vacation, try inviting the friend your child misses most to come and visit your new home for a week, or even a few weeks. I know this can be difficult if that child has to fly, but maybe you can work out a plan with the child’s parents. Think how happy the kids will be when they meet! 小题1:  The author had her kids sign up for the summer camp mainly because _____.
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her kids a chance to meet more kids