题目

阅读理解Hot Dog is popular.It's not a dog, but a cooked sausage in a long piece of bread. Here aresome stories and facts about it from English websites. （1） Americans started the tradition of eating hot dogs at baseball parks in . A . 1871 B . 1893 C . 1901 D . 1949 （2） It's believed that the name Hot Dog was created by . A . Tad Dorgan B . Charles Feltman C . Chris Von Der Ahe D . Johann Georghehner （3） What can we know about hot dogs from the passage? A . New Yorkers like eating hot dogs most in the world. B . Germans eat about 150 milli识图回答下列问题：（1）[1] 和[4] 合称表皮，起 作用．（2）[2]和[3]合称 ，在其中含有大量的叶绿体，所以叶片呈绿色．（3）[5] 起支持和疏导作用．（4）叶与外界进行气体交换的“窗口”是[ ] ，它由一对[ ]  构成，与[6]开闭关系密切的物质是 ．