题目

海兔，别名海蛞蝓（/kuò yú/），属软体动物类腹足纲（Mollusca：Gastropoda）。两种海蛞蝓（Elysia marginata和Elysia atroviridis ， 缘边海天牛和缘深海天牛）能在自行断头（自切）后重新长出心脏及其他身体器官。科学家猜测这可能与它们的盗食质体能力有关，这两种海蛞蝓都可以利用光合藻类生存。海蛞蝓具备盗食质体能力，可以整合所食用的藻类中的叶绿体。失去捕食能力的动物能通过整合的叶绿体进行光合作用合成有机物。科学家表示这种自切可能是Hilton English Language Center Information for New Students CLASS TIME：8:30a.m.—10:00a.m.，10:30a.m.—12:00a.m.，1:30p.m.—3:00p.m.. The Language Center is open Monday to Friday. Each class has one afternoon free per week. On the first day, go to the lecture hall to check your timetable. SELF—ACCESS：The language laboratory（Room 1110）is open Monday to Friday from 3:15p.m. to 5:00p.m. for all full-time students. You can learn how to use computers for language games or word-processing（文字处理）. There are tapes for students to borrow to practice their English. Go in and ask the teacher to show you. If you plan to take public examinations, there are dictation and listening comprehension tapes for you to practice with. There are cloze exercises on the computers. Ask your class teacher for a list of past exam essays. Students can borrow tapes to take home but they must be returned after two days. ATTENDANCE（出勤）: All students are expected to attend classes as it is required. Students who do not attend classes will be reported to OSS. Eighty percent attendance is required for students to receive their certificates（证书）when they finish their courses. It is also required by OSS for an extension to your visa. BOOKS: If students are given course books, the books are their responsibility. If a book is lost, the student will be expected to pay for it. If students wish to buy books, there is a bookshop in the college specializing in English books（Room 3520）. When do classes begin and end on a full day? A．8:30a.m.—1:30p.m..      B．8:30a.m.—3:00p.m.. C．8:30a.m.—3:15p.m..     D．3:15p.m.—5:00p.m.. Which of the following statements is true? A．No teachers are in the language lab. B．90% attendance is required for the students. C．Books can’t be taken out of the center. D．Students can prepare for exams by listening to tapes. Timetable can be seen in       . A．the lecture hall    B．Room 3520   C．the classroom     D．Room 1110 The books which the students wish to buy are in the       . A．library            B．bookshop in the college    C．street       D．classroom