生物体细胞的体积趋向于小的原因是（   ）

人们常用“一人之下，万人之上”来形容丞相（宰相）的地位。宋太祖为了防止宰相权利过大而采取的措施是（    ）

用所给动词的正确时态、语态填空
⑴Be quiet, please ! The baby____ (sleep).
⑵—What does Frank often do at weekends?
—He often____ (go) to the cinema with his parents.
⑶Andy ____ (argue) with his brother when I went to see him yesterday.
⑷She ____ (be) to her hometown several times.
⑸____ (play) computer games too much is bad for your eyes.
⑹Lucy tried ____(not make) too many mistakes in the exam.
⑺He ____  to us as soon as he gets there. (write)
⑻By the time I got outside, the bus____ (leave).
⑼I'm sure I ____  her four years ago. (see)
⑽In summer,  Miss Xia would rather ____  (stay) at home than go out.

生活在东汉时期、著有《伤寒杂病论》一书、被后人尊称为“医圣”的是(      )

读“世界某年总人口和国内生产总值比较图”，完成下列问题。