材料中“万物各得其和以生，各得其养以成”，引自《》。这句话的大意是，万物各自得到自然的调和而生长，各自得到自然的滋养而成熟。
A. 荀子·天论
B. 《均节赋税恤百姓六条》
C. 杜甫《绝句二首》
查看答案
What is NOT the advantage of people with greater optimismaccording to the lecture?
A. They tend to have better health and live longer.
B. They appear to make people happier.
C. They are better gamblers.
D. They are helpful in the work environment.
Which is true about pessimistic people according to the lecture?
A. Pessimists have little control over their determination.
B. Pessimists have a welcome trait for entrepreneurs.
C. Pessimists are more likely to start smoking again sooner.
D. Pessimists like to take chances.
What is advisable for viewing situations according to the speaker?
A. Having an optimistic outlook.
B. Having a pessimistic outlook.
C. Having a more optimistic view at the beginning.
D. Having a more pessimistic view at the beginning.
String对象的常用属性有几个
A. 1
B. 2
C. 3
D. 4
微信支付 
支付宝支付