A. genes can decide all your characteristics from parents

　　B. genes exist inside cells that make up all living things

　　C. genes tell every part of the cell what to do

　　D. chromosomes come in pairs containing genes

　　4. From the passage we can conclude that________.

　　A. not all cells have one nucleus inside

　　B. not all living things are made up of cells

　　C. genes aren’t in humans but in animals and plants

　　D. DNA is made of chromosomes and genes

　　(B)

　　［2012南昌模拟］

　　Young women are more adventurous than young men when travelling abroad in gap years. One in three female backpackers visits more than three countries during a year out and travels alone, according to new research. By contrast, the majority of their male counterparts visit only one country and tend to travel in groups, says a survey by the Gap Year company, which provides information and services for students considering taking a year out.

　　More women than men say that their prime reason for taking time off is to see the world and experience different cultures. Men were more likely to rank “having fun” higher on their list of preferences. Women were more likely to value the challenge of a foreign trip, and many cited reasons such as learning a language and meeting new people.

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