菜豆种子和玉米种子的相同之处为〔〕
A．最外面都是种皮
B．子叶的数量
C．都有胚乳
D．胚的构成
答：菜豆种子和玉米种子的结构中都有种皮和胚，而且胚有子叶、胚芽、胚轴、胚根四部分组成．
A：菜豆种子的最外面是种皮，而玉米种子的最外面是果皮
B：菜豆种子的子叶是两片，玉米种子的子叶仅有一片，二者子叶的数量不同
C：菜豆种子没有胚乳，玉米种子有胚乳
D：胚的构成都有子叶、胚芽、胚轴、胚根四部分．
故选D
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| One afternoon I was sitting at my favorite table in a restaurant, waiting for the food I had ordered to arrive. Suddenly I 1 that a man sitting at a table near the window kept glancing in my direction, _ 2 he knew me. The man had a newspaper 3 in front of him, which he was 4 to read, but I could 5 that he was keeping an eye on me. When the waiter brought my 6 , the man was clearly puzzled by the 7 way in which the waiter and I 8 each other. He seemed even more puzzled as 9 went on and it became 10 that all the waiters in the restaurant knew me. Finally he got up and went into the 11 . When he came out, he paid his bill and 12 without another a glance in my direction. I called the owner of the restaurant and asked what the man had 13 . "Well, "he said, "That man was a detective(侦探). He 14 you here because he thought you were the man he 15 ." "What ?"I said, showing my 16 . The owner continued, "He came into the kitchen and showed me a photo of the wanted man. I 17 say he looked very much like you! Of course since we know you, we told him that he had made a __18_." "Well, it's really 19 I came to a restaurant where I'm known, "I said. " 20 , I might have been in trouble." | |||
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