Vectơ vận tốc của một vật dao động điều hòa luôn

A. hướng ra xa vị trí cân bằng.                                B. hướng về vị trí cân bằng.

C. ngược hướng chuyển động.                                D. cùng hướng chuyển động.

Trong hiện tượng giao thoa sóng trên mặt nước, khoảng cách giữa một cực đại và một cực tiểu liên tiếp nằm trên đường nối tâm hai sóng có độ dài là

A. một bước sóng.                                                   B. một nửa bước sóng.

C. hai lần bước sóng.                                               D. một phần tư bước sóng.

The best title for this passage is "______"

            A. Traveling in Europe                                                C. Working and Living in Japan

            B. How to Study Japanese                                         D. Choosing a Foreign Language

A-You need to examine (41) _________ and your reason for going to university before you start your rearch. Why are you going? What are your abilities and strengths? What are your weaknesses? What do you want out of life? Are you socially self-sufficient (42)_________ do you need warm, familial (43) ___________ ? Talk with your family, friends and high-school counselors as you ask these questions. The people (44) __________ know you best can help you the most with these important issues.

          B- Very few high-school students have enough information or (45)__________ to choose a major. You need to be well-(46) __________ to determine your interest and aptitude. Many students (47) ___________ their minds two or three times before they settle on a major.

          C-  you do not have to go to university right (48) __________ it is never too late. There is no such thing as the perfect time to start university. Some students benefit from a year off to work, study or travel, and these experiences (49) ________ them to be better, more engaged students. Some students choose to apply to university and gain admission and then defer their entrance, while others wait to apply until after they have had (50)_______ alternative experience.

41.     A. you                             B. your                        C. yours                                 D. yourself

42.     A. or                                B. but                          C. nor                                    D. either

43.     A. support                       B. bringing                  C. feeding                             D. growth

44.     A. which                         B. whom                     C. who                                  D. whose

45.     A. expenditure                B. experiences             C. experiment                        D. expert

46.     A. prepare                       B. prepared                 C. preparation                       D. preparative

47.     A. transform                    B. translate                  C. change                              D. convert

48.     A. for                              B. up                           C. over                                  D. away

49.     A. allow                          B. make                       C. let                                     D. advise

50.     A. a                                 B. an                            C. the                                    D. Ø