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4. 拍摄动体景物，要获得“虚糊”画面时，一般可选择（ ）。 （1分）
A
A快门速度快B快门速度慢C大光圈系数D小光圈系数
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B
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As we recently discovered，there is a Stepmother’s Day，though it is not on any official holiday calendar.So，it would be safe to assume that there is a similar day for stepdads，too.Right? Well，it depends on what you read.A Google search brought up posts that say，for example，“It’s on father’s day--father’s day is for fathers，step—fathers and people who are like fathers to you-it’s a day for making father figures feel special.”Further searching found a Stepfather’s Day Facebook page that says，“The unofficial Stepfather’s Day is the fourth Sunday of June.”Unfortunately，as of the publishing of this article，only 30 people have “liked” the page.Considering that studies show 3.3 million men，or 11.1%of U.S.fathers，live with at least one stepchild，that’s only a drop in the ocean.It’s interesting to note that there is a National Grandparents’ Day.President Jimmy Carter signed it into law in 1978.Law! While grandparents are undoubtedly special people in our children’s lives，they are often seen as the most loving family members.But what about the stepparents? The stepparents are the ones who are often the outsiders，the ones who have to endure the hurtful “You’re not my dad!” or “You’re not my mom!” And yet they never give up.They do their best to overcome the inherent challenges of stepparents and be role models for their stepchildren.These unsung(未被颂扬的)family heroes deserve “official” days of honor.Perhaps if we are loud enough，President Obama，who had a stepfather himself，will sign into law National Stepmother’s Day and National Stepfather’s Day.Are you with me? Follow me and get your voice heard.How cool it would be if we could make this happen!
低血钙患者肌肉兴奋增加，可发生手足肌肉紧张性痉挛，称为（ ）
根据我国的国情，要提高人均粮食产量，必须（ ）
关于子宫的说法，下列叙述中错误的是
依据我国《民法通则》的规定，下列情形中，以过错推定原则确定民事责任的是（）
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AFor 30 years, Randy J. Murphy drove without being stopped by the police—and without a driver’s license (驾驶执照).The 46-year-old man’s luck came to an end last May. On his way home from his job as a dishwasher, he turned up the radio in the car.“I just turned the corner, and there was Mark,” Murphy said of the police officer who has since made such a difference in his life.Officer Mark Taylor had stopped the car as he heard the blaring (震耳的) music. When he asked for a driver’s license, Murphy said that he didn’t have one.Murphy told Taylor he couldn’t read well enough to tale the written part of the licensing test. “He said people just don’t help anymore. I told him if he was willing, I’d help him,” said Taylor. He gave Murphy his phone number. That afternoon Murphy called the officer.For the next three months, the men met several times a week to review the questions which might appear in the test. When Murphy took the test, Taylor went with him. Murphy passed on his sixth attempt (尝试). He then sailed through the road test. On September 5, he got his license.Taylor’s act of kindness won him the Officer of the Month award(奖) from the Knoxville Police Department. “People should help each other if they can,” Taylor said. “Randy did all the work. I just guided him along.”Although Murphy has overcome the difficulty that kept him from getting a driver’s license, he hasn’t stopped there. “We still meet once a week to read,” Taylor said. “We’ve also become friends.”
巴黎圣母院的建筑风格属于（）
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