题目

下面是以小鼠为对象进行的研究工作，请分析回答问题。 （1）进行小鼠胚胎工程操作时，首先在光控周期下（光照14h，黑暗10h）饲养成年雌鼠，并注射促进性腺激素，目的是             。然后从雌鼠输卵管中取出卵子，在一定条件下培养成熟；并从雄鼠附睾中取出精子，在一定条件下培养一段时间，目的是           。再在37℃，5%CO2条件下，精卵共同作用4h，冲洗后继续培养。定时在显微镜下观察胚胎的变化，第5天右以看到胚胎发生收Tony is reading an advertisement in a magazine.  It is about different evening classes or weekend classes. The Learning Centre, Garden City We have evening and weekend courses on ... test preparation            friends and meeting people jobs and making money     cooking and language learning Some of this month's courses: 1. Get good grades! Do you forget information and do poorly on tests? In this course, learn to... ※ remember more (95 percent of what you read). ※ think quickly and read fast (400 words per minute!). ※ do well on tests and get high scores. 2. Find true love...today! Are you single and shy? Is it hard for you to talk to people? In this course, learn to... talk lo people; start a conversation with a man or woman. be more friendly and outgoing. ※ understand a person's body language. 3. You are on TV! Many actors get their start in television. You can too! In this course, learn to... ※ act in TV ads. ※ use your voice on the radio. ※ get TV and radio jobs. 4. Cook delicious and healthy food! Are you interested in cooking? Do you want to keep healthy? In this course, learn to... ※ keep a balanced diet. ※ cook delicious traditional Chinese food. ※ make western-style food. This course is also online al www. dffh. net. cn. 1.In the Learning Center, you won't learn how to______. A. prepare for a test    B. make money C. learn a language     D. get along well with others 2. After taking course 1, you can't_______. A. think quickly B. improve your memory C. remember everything you read D. finish reading a 200-word passage in 30 seconds 3.After taking course 3, you can learn how to_______. A. become an actor (actress)   B. become a radio reporter C. become a TV host (hostess)   D. get a job in a radio station 4.Which course is allowed to take online? A. Course 4.   B. Course 3.   C. Course 2.   D. Course 1. 5.What's the advertisement about? A. Finding true love.         B. Getting good jobs. C. Cooking delicious food.     D. Different evening and weekend classes.