根据短文内容, 选择正确答案。

There are many holidays and festivals. Dads have Father's Day. Children have Children's Day. Is there a special day for old people?

Double Ninth Festival is a special day for old people in China. It started long ago. The festival is on lunar September 9th. This year it is on October 13th. On this day, people show love for their grandparents.

People do many different kinds of things on this day. They enjoy flowers, eat special cakes and drink wine(酒).

      It's very interesting. The best way to celebrate it is climbing hills or mountains. People think climbing will bring them good luck and help old people live long lives. Double Ninth Festival is also a good time for a family get-together. And young people give their presents and best wishes to the old.

句子感悟。

我恋恋不舍地下了网, 心思还在那新奇的网络世界里！

“恋恋不舍”的意思是：____；

  这句话表现了____。

《唐掂言》:“绍绅虽位极人臣，不由进士者，终不为美。”写出了文人对哪一制度的重视?（    ）

i.CO(g)+2H₂(g) CH₃OH(g)   ∆H₁=−90.1kJ·mol⁻¹

ii.2CH₃OH(g) CH₃OCH₃(g)+H₂O(g)   ∆H₂=−24.5kJ·mol⁻¹

当其他条件相同时，由H₂和CO直接制备二甲醚的反应中，CO平衡转化率随条件X 的变化曲线如右图所示。下列说法正确的是(   )