正确答案: B

"东方红一号"发射成功

题目：标志着中国进入航天时代的事件是( )。

解析：1970年4月24日21时35分，我国第一颗人造卫星"东方红"1号发射升空，东方红一号的成功发射标志着我国进入了航天时代。故选择B。A选项，1964年，我国第一颗原子弹爆炸成功。C选项，神舟五号中国第一个载人航天飞行器（杨利伟）。D选项，"远望一号"航天测量船主要担负卫星、飞船和火箭飞行器全程飞行试验测量和控制任务

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学习资料的答案和解析：

[单选题]11,14,20,29,41,( )

56

解析：本题中的相邻两项之差构成一个等差数列3，6，9，12，…，相差数为3。根据这一规律，推算出最后两项之差应为15，故选择C选项。

[单选题] On average, American kids ages 3 to 12 spent 29 hours a week in school, eight hours more than they did in 1981. They also did more household work and participated in more of such organized activities as soccer and ballet. Involvement in sports, in particular, rose almost 50% from 1981 to 1997: boys now spend an average of four hours a week playing sports; girls log half that time. All in all, however, children's leisure time dropped from 40% of the day in 1981 to 25%. "Children are affected by the same time crunch (危机) that affects their parents," says Sandra Hofferth, who headed the recent study of children's timetable. A chief reason, she says, is that more mothers are working outside the home.(Nevertheless, children in both double-income and "male breadwinner" households spent comparable mounts of time interacting with their parents,19 hours and 22 hours respectively. In contrast, children spent only 9 hours with their single mothers.) All work and no play could make for some very messed-up kids."Play is the most powerful way a child explores the world and learns about himself," says T. Berry Brazelton, professor at Harvard Medical School. Unstructured play encourages independent thinking and allows the young to negotiate their relationships with their peers, but kids ages 3 to 12 spent only 12 hours a week engaged in it. The children sampled spent a quarter of their rapidly decreasing "free time" watching television. But that, believe it or not, was one of the findings parents might regard as good news. If they're spending less time in front of the TV set, however, kids aren't replacing it with reading. Despite efforts to get kids more interested in books, the children spent just over an hour a week reading. Let's face it, who's got the time?

We can infer from the Passage that ________.

stopping kids watching TV is not a way to let them read

解析：1.推断题。文中第三段提到“Play is the most powerful way a child explores the world and learns about himself”即玩耍是儿童探索世界和了解自己最有效的方式，D选项符合题意，故选D。 2.细节题。文中第一段提到，现在的孩子每周待在学校的时间比1981年多8个小时，而且参加更多如足球、芭蕾舞等活动，尤其在体育运动上花费的时间也增多了；分别对应选项中的A、B、D。最后一句提到“children's leisure time dropped from 40% of the day in 1981 to25%”，即孩子放松、玩耍的时间变少了。所以C选项不是现在孩子面临的情况，故选C。 3.细节题。文中第二段第二句提到“A chief reason，she says，is that more mothers are working outside the home.”主要原因是更多的妈妈们在外面工作，故选A。 4.细节题。文中第三段最后一句话提到“Unstructured play encourages independent thinking and allows the young to negotiate their relationships with their peers, but kids ages 3 to 12 spent only 12 hours a week engaged in it．”即无组织的玩耍可以鼓励孩子的独立思考，但是3到12岁的孩子每周只有12个小时的时间做这些。所以D选项做更多有组织的活动，是现在孩子的一个很麻烦的问题。 5.细节题。文中最后一段提到，即使他们在电视上花费的时间更少的话，“Despite efforts to get kids more interested in books，the children spent just over an hour a week reading.”即每个孩子每周在阅读上花费的时间也只是一个多小时，故选项D正确。