在消化道内，下列哪组物质不经过消化可以直接被吸收（　　）

依次填入下面横线处的词语，最恰当的一组是           （　　）
是不是国奥队强劲还未可知，________对手防线的弱不禁风是肯定的；________“打烂篱笆墙”说明不了什么，________国奥小将们在极短的时间内多次打烂过来自不同国家的“篱笆墙”。________这次主场迎战韩国队有所突破，________，一切侥幸都证明不了什么问题。

叶片的表皮属于什么组织（  ）

甲、乙、丙、丁4中物质分别含2种或3种元素，它们的分子中各含18个电子。甲是气态氢化物，在水中分步电离出两种阴离子。下列推断合理的是

阅读理解

    Do you have an English name? I have noticed (注意到) one thing in China: lots of people have uncommon(不常见) English names.

    One of my Chinese friends calls herself Big Bird, like the character(角色) from the children's TV show Sesame Street(《芝麻街》). Another one of my friends is an English teacher. She had students with the names like Tomato and Potato. There were also two girls named Echo. Before I came to China, I had never met anyone with these names.

    People choose these strange names for different reasons. Sometimes they copy the names from someone famous. Other times, they want names that have the same meaning as their Chinese name.

    But having an uncommon English name isn't a big deal, is it? It can be fun sometimes. I once heard about a girl named Shmily. It stands for “see how much I love you”. It is my favorite strange English name.