某同学在研究轻质弹簧的长度随拉力变化的关系时,进行了如图所示的实验。已知每个钩码

题型:探究题

问题:

某同学在研究轻质弹簧的长度随拉力变化的关系时,进行了如图所示的实验。已知每个钩码重为0.5N,刻度尺的最小分度值是1mm.。

(1)请将观察到的数据填入实验记录表中

(2)根据实验数据,在坐标格内做出弹簧长度L随拉力F变化的关系图像;

(3)此实验中弹簧长度L与拉力F的关系是____________________________________。

考点:弹簧测力计的使用与读数弹簧测力计及其原理
题型:探究题

贾平凹、韩寒、郭敬明、李承鹏等50名作家联合一起声讨百度文库,称百度文库收录了上述作家几乎全部的作品,但却没有取得任何人的授权。自2010年年底以来,百度文库争议不断,先后被盛大文学、中国文字著作权协会等单位、机构起诉或公开谴责。《三一五作家讨百度书》作者慕容雪村告诉记者:“百度文库侵犯了声明中作家的所有作品,如果百度不停止侵权的行为,我们这些作家也会考虑采用法律手段维护自己的权益。”

(1)百度文库的行为侵犯了作家们的什么权利?

________________________________________________________________________________

(2)你能举出社会上侵犯这种权利的一些行为吗?至少两种。

________________________________________________________________________________(3)请你说说为什么要对这种行为说“不”?

________________________________________________________________________________

题型:探究题

Looking for a low-cost path to self-knowledge? A way to mine your subconscious①for clues to your motivations, desires and fears? No need to have years of treatment or analysis. Just look to your dreams.

“You can ignore your dreams, but you are really doing harm to yourself,” says Lauri Quinn Loewenberg. “If so, you’re letting red flags pass you by, letting great ideas pass you by.”

Some sleep researchers believe dreams are more directly related to our moods and emotions and can serve as tools to self-understanding. Dreams occur during the REM (rapid eye movement) cycles of sleep each night. For adults, that means about every 90 minutes. The first period of REM sleep may be short, 5 to 10 minutes, followed by longer periods, finally reaching an hour or more in the fourth or fifth period.

When people are dreaming, brain scans show a lot of activities. The brain is online during dreams. The experiences you have during the day are connected during dream sleep. People we know or experiences we’ve had at different times in our lives may be different in the same dream.

AmyBeth Gilstrap has had the same recurring② dream that annoyed her since Hurricane Katrina drove her and her daughter and friends out of New Orleans. Ms. Gilstrap says, “It is always spies. My job is to get people to some place.” She’s certain the dream is related to her effort in the hurricane to help several families leave. Sometimes her cats also are part of that dream. That’s because she went back into New Orleans, before it was allowed, to rescue her cats.

Today, through brain scans scientists have known that the parts of the brain that control emotion and long-term memory are active during REM sleep.

1. The passage is mainly to tell readers ______.

A. dreams are mainly caused by hard work     B. dreams can offer us key to self-knowledge

C. dreams are only activities of our brains      D. how dreams help us solve our problems

2. According to the words from Lauri Quinn Loewenberg, ______.

A. dreams can make you feel badly ill         B. you often have red flags in your dreams

C. dreams will make your life colorful         D. you may get great help from your dreams

3. According to the passage, the underlined word “it” in Paragraph 5 refers to ______.

A. Ms. Gilstrap’s dream   B. Ms. Gilstrap’s job   C. Hurricane Katrina   D. New Orleans

4. According to the passage, when you are dreaming at night, ______.

A. your dream is connected with your work that day

B. the dream will generally last about 5 to 10 minutes

C. the longer dream should be in the later part of the sleep

D. your eyes will still move slowly during the time

题型:探究题

化气汤功效与作用

题型:探究题

模板支架施工中,正确的做法是()。

A.依据施工方案和质量目标,选择模板支架体系,并按有关规范进行设计和验算

B.排架立杆间距原则上应按施工组织设计施工,必要时根据实际情况加大间距

C.顶板结构应先支立支架后铺设模板,并预留5~10mm沉落量

D.留置垂直施工缝时,端头必须安放模板,可不设置止水带

题型:探究题

当绞缠焊接K型热电偶时,其绞接长度相当于电极直径的()。

A.3~4倍

B.4~5倍

C.5~6倍

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