[多选题]下列属于法定免征关税的有( )。
A.无商业价值的广告品和货样
B.文化、体育交流活动中使用的表演、比赛用品
C.在海关放行前损失的货物
D.外国政府、国际组织无偿赠送的物资
E.开展科研、教学、医疗活动使用的仪器、设备及用品

Parents and teenagers often disagree about the amount of freedom and responsibility that young people are to have. The teenager often wants to be (21) to choose his own friends, select his own courses in school, plan for his own vocational (22) , and earn and spend his own money, and generally (23) his own life in a more independent fashion than .many parents are able to (24) .
Most problems between teenagers and their parents yield best to (导致) joint planning and decision making. Within any particular family (25) are avoided and problems are solved when all of the persons take (26) in the situation, (27) in working it out. (28) parents and young people learn how to get (29) well with each other and develop skills in understanding and (30) understood, even the most difficult problems are relieved.

If you intend using humor in your talk to make people smile, you must know how to identify shared experiences and problems. Your humor must be relevant to the audience and should help to show them that you are one of them or that you understand their situation and are in sympathy with their point of view. Depending on whom you are addressing, the problems will be different. If you are talking to a group of managers, you may refer to the disorganized methods of their secretaries; alternatively if you are addressing secretaries, you may want to comment on their disorganized bosses.
Here is an example, which I heard at a nurses’ convention, of a story which works well because the audience all shared the same view of doctors. A man arrives in heaven and is being shown around by St. Peter. He sees wonderful accommodations, beautiful gardens, sunny weather, and so on. Everyone is very peaceful, polite and friendly until, waiting in a line for lunch, the new arrival is sud
A. Use Humor Effectively
B. Various Kinds of Humor
C. Add Humor to Speech
D. Different Humor Strategies