题目内容：

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Babies are not just passing idle time when they stare goggle-eyed at the television—they are actually learning about the world, U.S. researchers said. Parents may want t limit what their babies see on television , based on the study, said Donna Mumme, assistant professor of psychology at Tufts University in Boston, who led the research. “Children as young as 12 months are making decisions based n the emotional(情感的)reactions of adults around them,” Mumme said in a statement. “It turns out they can also use emotional information they pick up from television. This means that adults might want to think twice before they speak in a loud and harsh voice or let a baby see television programs meant for information about the world. A mother urging her baby to eat some  “yummy” soup on a brother crying in fear when a dog approaches can influence a baby’s reaction. Mumme’s team tested babies to determine. If television has the same influence, showing actors reacting on a videotape to objects such as red spiral letter holder, a blue humpy ball, and a yellow garden hose attachment. Babies aged 10 months or 12 months were later given the same objects to play with. Ten-month-olds did not seem to e influenced by the video buy the 1-year-olds were. When the actors acted neutrally or positively to an object, the babies happily played with them. But if the actor had seemed afraid or disgusted, the babies would avoid the object.

72．Psychology is the study of             .

A．human’s society and its growth

B．human’s hopes had dreams

C．human’s mind and behaviors

D．human’s languages and cultures

73．Which of the following is Mumme’s conclusion?

A．Small babies should not be allowed to watch television programs.

B．Adults need to think twice before they act in front of small babies.

C．TV programs provide small babies with all the information they need.

D．One-year-olds can be emotionally influenced by TV programs.

74．Mumme reached his conclusion by            .

A．measuring the time babies spent in front of TV.

B．making TV programs and advertisements for kids.

C．showing actors how to react to blue bumpy balls

D．observing small babies’ reactions to TV programs

75．Which of the following may the study lead to according to the researchers?

A．Parents may want to limit what their babies see on television.

B．Actors may try to behave themselves well in front of babies.

C．Babies may be allowed to choose what they see on TV.

D．Scientists may stop ignoring babies’ emotional world.