Dragon Head Raising Day: time for a haircut
China is a country with many colorful days and festivals. The Dragon Head Raising Day (Longtaitou) is one of them.
This special day is on the second day of the second month in the Chinese lunar calendar (阴历). It stands for (代表) the start of spring and farming. This year, the day fell on March 10.
The dragon is important in Chinese culture. We Chinese people call ourselves the “descendants (传人) of the dragon”. Therefore, people celebrate th e Dragon Head Raising Day with many customs about dragons.
On the day in ancient times, people put ashes (灰) in the kitchen. This was to “lead the dragon into the house”. People believed that with the help of the dragon, they could have a good harvest (收成) in autumn.
Also, people eat special foods on that day. The foods are usually named after dragons. For example, people eat “dragon whisker (细须)” noodles and dumplings called “dragon teeth”.
Today, many customs have faded away (消退). But one that has remained is the cutting of hair. It was said that a haircut during the first lunar month may bring bad luck to the mother’s brothers. So many people have their hair cut on the Dragon Head Raising Day.
下列命题中，是真命题的是（ ）
为了进一步了解义务教育阶段学生的体质健康状况，教育部对我市某中学九年级的部分学生进行了体质抽测，体质抽测的结果分为四个等级：优秀、良好、合格、不合格，根据调查结果绘制了下列两幅不完整的统计图，
请你根据统计图提供的信息回答以下问题：
在扇形统计图中，“合格”的百分比为______；
本次体质抽测中，抽测结果为“不合格”等级的学生有______人；
若该校九年级有名学生，估计该校九年级体质为“不合格”等级的学生约有
______人．