题目

为了探究甲状腺激素对蝌蚪发育的影响，某兴趣小组设计了如下探究实验：a、取两个规格相同的玻璃缸，分别贴上标签 A、B；b、在两缸中分别加入 2000mL 河水，并分别饲养 10 只同种、同等大小的蝌蚪；c、A 缸隔天加入甲状腺激素制剂 5mg，持续 5 次，B 缸不加，其他条件相同；d、两缸同时隔天换水一次，每天喂少许熟蛋黄粉和碎菜叶。结果记录如下，请分析回答： （1） 实验中 A 缸和 B 缸的规格、加水量、蝌蚪的数量、大小等条件都必须保持一阅读理解。                                                                   Quick Work      Ted Robinson has been worried all the week. Last Tuesday he received a letter from the local police.In the letter he was asked to call at the station. Ted wanted to know why he was wanted by the police, but he went to the station yesterday and he is not worried any more.     At the station, he was told by a smiling policeman that his bicycle had been found. Five days ago, the policeman told him, the bicycle was picked up in a small village four hundred miles away. It is now beingsent to his home by train.     Ted was the most surprised when he heard the news. He was amused (感到有趣), too, because he never expected (指望) the bicycle to be found. It was stolen twenty years ago when Ted was a boy offifteen. 根据短文内容回答下列问题： 1. What happened last Tuesday?    __________________________________________ 2. What was he told at the station?     __________________________________________ 3. What are the police doing with the bicycle?    __________________________________________4. Why was he surprised and amused?     __________________________________________ 5. How old was Ted when his bicycle was stolen?     __________________________________________