题目

平价商场经销的甲，乙两种商品，甲种商品每件售价98元，利润率为40%；乙种商品每件进价80元，售价128元. （1） 求甲种商品每件的进价；（利润率＝ ×100%） （2） 若该商场同时购进甲、乙两种商品共50件，恰好总进价为3800元，求购进甲、乙两种商品各多少件？ （3） 在“元旦”期间，该商场只对乙种商品进行如表的优惠促销活动： 打折前一次性购物总金额 优惠措施 少于等于480元 不优惠 超过480元，但不超过680阅读理解。                                               How Americans Began to Eat Tomatoes      People have strange ideas about food. For example, the tomato is a kind of very delicious vegetable. It is one of useful plants that can be prepared in many ways. It has rich nutrition and vitamin in it. But in the 18th century, Americans never ate tomatoes. They grew them in their gardens because tomato plants are so pretty. But they thought the vegetable was poisonous (有毒的). They called tomatoes "poison apples." President Thomas Jefferson, however, knew that tomatoes were good to eat. He was a learned man. He had been to Paris, where he learned to love the taste of tomatoes. He grew many kinds of tomatoes in his garden. The President taught his cook a way for a cream of tomato soup. This beautiful pink soup was served at the President's party. The guests thought the soup tasted really good. They never thought their president would serve his honored guests poison apples. Jefferson never spoke to his honored (忠实的) guests about the fact. 1. After you read the passage, which of the following do you think is true? [     ]A. Americans never ate tomatoes after they began to plant them. B. Americans didn't eat tomatoes before 19th century. C. Even now Americans don't eat tomatoes. D. In the 18th century Americans ate a lot of tomatoes. 2. The passage tells us that Jefferson was a President who learned to love the taste of tomatoes ______. [     ]A. while he was in Paris B. when he was a little boy C. because his parents told him so D. from books 3. According to the text, ______ made the beautiful pink soup served at the President's party? [     ]A. the President himself B. a French cook 　 C. the President's cook D. the President's wife 4. From the passage we know all the honored guests invited by Jefferson were ______. [     ]A. people from other countries　　　 B. from France C. people of his own country　　　　 D. men only 5. According to the passage, which of the following is NOT true? [     ]A. All of the guests knew the soup that was served at the President's party was made of tomatoes. 　 B. All of the guests thought the soup which was prepared by the President's cook was nice. 　 C. All of the guests thought the taste of the beautiful pink soup was nice. 　 D. None of the guests knew that their president would serve his honored guests poison apples.