历史上第二次生产力的发展改变了人口增长模式，具体表现为（    ）

  用“一边……一边……”造句。

①妈妈一边____一边____。

②王老师一边____一边____。

③ ____一边____一边____。

    Hello. I'm Lucy. Let's meet my family. I'm twelve years old. My year is the year of the pig. My mother is thirty-six years old. Her year is also the year of the pig. My father is thirty-seven years old. His year is the year of the dog. My brother is two years old. His year is the year of the rooster.

⑴Lucy ____       A.12      a.

⑵Father ____     B.2        b.

⑶Mother ____    C.37      c.

⑷Brother ____    D.36     

在“中学生营养日”活动中，专家提出：大力宣传普及营养科学与食品卫生知识，扫除“营养盲”在我国城乡已成当务之急．你认为下列观点正确的是（　　）