阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。

    On Feb. 4, Mohammad Hasher, a 17-year-old who lives in Michigan, woke up to find his 6-year-old sister, Noor, sitting on the couch wearing a fancy outfit(全套服装).

    It was 8 a.m., and she wasn't in her nightclothes but instead wore dress. The first-grader also looked upset. “I asked her, 'Noor, what on earth are you doing?'” Mohammad told Huffington Post.

    Noor told her brother that there was a big father-daughter dance at her school that night, and she wanted to go, but couldn't. Mohammad told the newspaper that their parents got divorced in November, and their father hasn't spoken to them since then. His absence has been really rough on the family, especially for Noor, who decided she was going to wear a dress that day anyway, even if she couldn't go to the dance.

    Mohammad made an immediate decision.”I told her I'd take her,” he said. “And her face lit up! It was so cute.” later that afternoon, Mohammad took Noor shopping to make sure she looked very best that night. He bought her a new dress, socks and shoes and brought her to a salon to get hair done. That night they went to the dance and had great fun. Noor even got a box of candy when Mohammad won the title of “Best Dad” at the dance.

    “The night was awesome, ” he said, “It filled my heart with happiness seeing her dance with so much joy and have fun with all of her friends.” Mohammad said her sister thanked him with a huge hug at the end of the night. Touched by the experience, he posted pictures of their sweet party on Twitter(推特)：

    “I got to take my baby sister to her first daddy-daughter dance the other night, ” he tweeted. “Sorry you don't have a dad but I'll always be there for you. ” The post soon spread widely with over 104,000 likes and 25,000 retweets.

阅读理解

    Over the last week, a "poisonous kale（甘蓝菜）" theory has been going widespread after an article warned that the vegetable was associated with a variety of medical conditions. It's time to separate fear from fact on the health benefits of kale.

    As a member of the cabbage family, kale is low in calories and rich in nutrients and minerals, especially vitamin A,C and K. Consumed for thousands of years, it's been a health plus for millions of eaters throughout the world.

    However, numerous web articles have reported on some evidence offered by a medicine researcher. The researcher found that thallium（铊）was detected in a few people who were heavy consumers of kale. Thallium is a heavy metal often found in trace amounts（微量）in soil and minerals. His conclusion was that these medical conditions were connected to the impact that trace amounts of thallium detected in some kale samples had on the body.

    I don't think the conclusion is based on a strict scientific basis. It's essential to point out that the original report was in a web magazine, not a scientific journal which is subject to peer review by other scientists. A scientific review includes a careful evaluation of how the findings and conclusions were made. Certain factors are critical before an evidence-based conclusion can be made, such as: how many people were in a study; how well controlled were other factors; how much kale was consumed and for how long; how much thallium was in the kale.

    It is a fact that kale and other vegetables can absorb thallium from the soil. But the ability for a plant to absorb traces of a chemical does not automatically make it harmful to your health. And even finding measurable amounts of thallium in someone's body doesn't imply that the thallium is causing an ill health effect, according to the CDC.

    But we can still learn a lesson from this. Plants grow in soil. Growers must continue to be careful in monitoring the quality of their soil. And what about consumers? Eat your kale—and include lots of other colorful fruits and vegetables. As with all things in nature, variety is key for good health.

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

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如图所示，，卷扬机的绳索通过定滑轮用力F拉位于粗糙斜面上的木箱，  使之沿斜面加速向上移动。在移动过程中，下列说法正确的是  

如图是“白菜一甘蓝”杂种植株的培育过程。下列说法正确的是(    )