5mol C₄H₈O₂中约含有　____ 个氢原子（用科学记数法表示）．

用竖式计算

66＋24=____

假如你是校报英文版编辑，要发一篇关于“东莞市首届英文歌大赛”报名通知，内容包括：

报名时间	3月10日――5月10日
参赛人员	在东莞工作、生活、学习的英语爱好者、外籍人士等；
上传材料	30秒的个人介绍
活动意义	提高英语学习兴趣、结识新朋友

参考词汇：报名sign up     上传upload

注意：1）词数100左右；

2）可以适当增加细节，以使行文连贯；

3）开头和结尾已给出，但不计入总词数；

4）文中不能出现真实校名或姓名。

Notice

Hello, everybody!

    The 1^st Dongguan English Singing Talent Show is going to be held.

    Thank you

Editor Li

下列关于自由落体运动的说法，正确的是：

   ⑴在你班上谁更擅长科学，男孩还是女孩?Nowadays, girls start to show more interest in science, technology, engineering and math (STEM) subjects, according to a recent study by Cambridge Occupational Analysts (COA), UK.

    In the study, last year, ⑵over .20,000 students who were in their final year in high school were surveyed. The number of girls considering university courses in STEM subjects has been larger than that of boys. Over a fifth of the girls surveyed said they were considering related jobs, such as engineering and technology. Interest has also risen in mechanical (机械学的) engineering, electrical engineering and the sciences.

    ⑶对于英国的妇女，这是一个重要的改变。In the past, there were not nearly as many women as men studying STEM subjects or working in STEM related fields. Only 13% of people who graduated from university with STEM degrees were women. Now, there are about 22%. ⑷In the past, only one eight of the STEM jobs were held by women. This was partly because of the stereotype (刻板印象) that men are more suited to this work than women. Now it has been changed. Over 20% of the engineers are women in the UK.

    In fact, STEM subjects are fun and exciting. Studying science can benefit (使……受益) girls. “It opens girls up to fascinating careers,” Niki Yates, manager of GSK's UK Business, told The Daily Telegraph. She says ⑸it is important to encourage young women to do these jobs. They will receive higher pay in these areas. More women in work also helps the economy grow.

⑴____ ⑵____ ⑶____ ⑷____ ⑸____