A mathematical question about number 7 According to my book, 7 is not the sum of squares. What does this mean? (PS: it also says it is the lowest number that cannot be represented as the sum of the squares of three integers.

A Chart Analysis The chart give information on several post-school qualifications in Australia and how much did men and women account for in each one of them in 1999. It's noticeable that men occupied a large proportion of Skilled vacational diploma, leaving less than 10% for women. Also, postgraduate diploma was another chief qulification for men, with 70%, and the figure for this was more than doubled by contract to the amount on women, with a mere 30%. As for the master's degree, males and females accounted for 60% and 40% respectively. The proportion of males holding bachelor's degree was equivelant to that of females, according to the chart. While in the case of undergraduate diploma, there was a remarkable difference that most graduates were females, leaving a low percentage, just under 40%, of males. In short, most men held skilled vocational diploma in Australia in 1999 while women occupied more in the qualification of undergraduate diploma.

Writing Task One on IELTS The graph provides daily need of electricity in England during winter and summer. The pie chart indicates how British people use the electricity. Generally, the demand for electricity in winter was twice the units of electricity used in summer. In winter, electricity was consumed quickly at 10 p.m., more than 40,000 units, while the hightest figure for this, as much as 20,000, was at 2 p.m. in summer.Throughout 8 to 9 a.m., there is a decrease both in winter and in summer, with 30,000 units and over 10,000 units respectively. The electricity in England was primarily used for giving heat to the house. And a less proportion of this, about 17.5%, was for kitchen machines, such as ovens, kettles, etc. The usage of entertainment appliance took up 15% on the whole, same as the amount of elecrticity consumed by some electric tools. To summarise, British people used more electricity in winter especially at night, and they commonly consumed it by increasing the temperature in houses.

How to say "吃货" in English? WHen learning phrases about food, I got confused. Hope you can help me! Thank you!