题目

下列有关酿脓链球菌的叙述，正确的是（    ） A.含有DNA或RNA，其中贮存着它的遗传信息     B.刺激人体免疫系统产生的抗体可导致自身免疫病 C.在固体培养基上培养后肉眼可见链状排列的球菌 D.侵入心脏瓣膜引起化脓性炎症，导致风湿性心脏病   答案：B　　As is true in all cultures, Americans first hear music in the context of family life. Much of that music comes from the records on the family radio or television, and this “canned” music is especially important in developing children's musical taste. People often say they were very strongly influenced by the kind of music they heard before they were old enough to have their own records or choose the station on the family radio. There is usually some live music in the family as well. Many mothers and grandmothers sing lullabies （催眠曲）, for example. These can be important since in America, as elsewhere, lullabies not only lull（催眠）a baby to sleep but promise, praise and teach cultural values. Sometimes lullabies are the only songs in a foreign language that American children with strong ethnic（种族的）backgrounds bear, since people often fall back on old, familiar languages for intimate songs. 　　Another important family context is the automobile, where families learn songs and sing together on weekends and vacations. This is not as surprising as it appears, for the family car has become one of the basic centers of family experience, and it is one of the important place where the family gathers for an extended period of time without outside disturbance. The family used to have to choose between making their own music in the car or being force-fed by the radio, but the recent invention of automobile cassette recorders and eight-track playback machines allows a family to have more control over what they hear when they drive. (1) “Canned music” (Para.1) refers to ________. [　　] A．music passed down from older generations B．recorded music in contrast to live music C．modern music young people can enjoy D．music children hear in an automobile (2) The music children first hear is important in ________. [　　] A．shaping their likes and dislikes in music B．learning language C．developed their talent in music D．maintaining their strong ethnic backgrounds (3) Lullabies are usually sung in ________ in the passage. [　　] (4) The word “context” (Para. 1, Line 2) means ________. [　　] A．occasionsB．conditions C．surroundingD．backgrounds (5) The recent invention of automobile cassette recorders allows a family to ________. [　　] A．extend the period of time they spend in cars B．have more choice in the music they hear C．enjoy music without outside disturbance D．have another place to get together