6、It is not unusual at all for teens to answer their parents with one-word answers. "Where are you going?" "Places." "When will you be back?" "Sometime." "Who will you be with?" “people."

That means that the days of your children bounding (跳跃着跑) in the front door with the details of their day are over. They are breaking away from you so that they'll be able to stand on their own as a young adult.

Some parents feel sad about this loss of their children's closeness. Of course you miss those conversations and friendly talks. Once your children move out after high school and establish themselves confidently as a young adult, they'll come back for easy conversations and even ask for advice. But in order to determine who they are right now, they need to separate from you.

Your job, however, is to keep them safe ― and that requires knowing where they are and who they are with. Let them know clearly that it's not because you want to dominate (支配) their life and control them; it's because it's a safety issue for family members to keep track of one another.

When they're home and sit down to eat a meal, sit down with them. You need to open up to them about your life. Tell them of an interesting incident at the office, let them in on a bit of family gossip (闲谈) , discuss a piece of news with them. They are glad that you see them as old enough to be in on a few experiences of your life. By letting a teen in on your life, they just may let you in on theirs.

 

72. It can be inferred from the passage that ____.

A. the generation gap is becoming wider and wider

B. teens quarrel a lot with their parents

C. teens don't want to live with other family members

D. some parents feel distant from their teenage children

73. The author believes that teens' one-word answers show ____.

A. their awareness of independence             B. their physical and mental changes

C. an unpleasant parent-child relationship     D. their wishes for keeping silent

74. What's the main idea of the last paragraph?

A. Parents should understand their children.

B. Parents should keep their children safe.

C. Parents should open their hearts to their children.

D. Parents should give their children enough freedom.

75. What's the author's purpose in writing the passage?

A. To give advice.                                    B. To direct teenagers.

C. To present findings.                              D. To comfort parents.

5、Imagine putting some bacteria in the freezer and taking them out millions of years later to find that they are still alive.

That would be similar to what happened recently, when scientists brought eight-million-year-old bacteria back to life ― simply by thawing them out.

The ancient bacteria were found frozen in the world's oldest known tracts of ice, the glaciers (冰川) of Antarctica.

Professor Bidle and his colleagues found and revived (复活) two samples of bacteria from the glacial ice. The first was a hundred thousand years old, and the second was around eight million years old. The eight-million-year-old bacteria were alive. But their genes were seriously damaged from long exposure to cosmic (宇宙 ) radiation, which is higher at the earth's poles.

Most of the bacteria in the samples probably blew over from African deserts, said Paul Falkowski, a scientist at Rutgers University. Once the bacteria landed on the glacier's snowy surface, they combined with the snow to form ice. "These ices are actually gene banks," he added.

As glaciers and ice caps melt as a result of increasing global warming, large amounts of bacterial genetic material might be washed into the ocean.

These bacteria might get incorporated into today's bacteria in the ocean, or living bacteria from the ice might also grow and have an important effect on the ecosystem.

"How that's going to play out, we don't know," Bidle said. He and Falkowski plan to focus their future work on how current ice melting influences modem bacteria's genetic diversity.

 

68. Professor Bidle found that the eight-million-year-old bacteria were __.

A. alive with their genes damaged

B. as active as the one-hungred-thousand-year-old ones

C. totally the same as what they used to be

D. harder to revive than the one-hundred-thousand-year-old ones

69. According to Paul Falkowski, the ices in Antarctica are gene banks because ____.

A. there are bacteria from African deserts    B. dead bacteria in them can be easily revived

C. they are fit for people to store bacteria    D. plenty of living bacteria can be found in them

70. Professor Bidle and Paul Falkowski will probably do research into the influences of ____.

A. global warming                         B. bacteria's genetic diversity

C. glacier melting                          D. biological diversity

71. What is the passage mainly about?

A. Ocean exploration.                        B. A scientific plan.

C. A scientific discovery.                   D. An interesting experiment.

 0  41829  41837  41843  41847  41853  41855  41859  41865  41867  41873  41879  41883  41885  41889  41895  41897  41903  41907  41909  41913  41915  41919  41921  41923  41924  41925  41927  41928  41929  41931  41933  41937  41939  41943  41945  41949  41955  41957  41963  41967  41969  41973  41979  41985  41987  41993  41997  41999  42005  42009  42015  42023  97155 

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网