若一艘轮船从上海驶往澳门，当它从长江口驶入大海时（   ）

人胰岛细胞能产生胰岛素，但不能产生血红蛋白，据此推测胰岛细胞中（　　）

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.

读“某城市不同时期人口密度与市中心距离关系图”，完成：

按城市发展过程，上述四幅图的排序依次是

美国历史学家马士在他的著作中介绍了英国人赫德对中国戊戌变法的看法，赫德的意见如下：皇帝的方向是正确的，但是他的顾问康有为和其他人等都缺乏工作经验，他们简直是以好心肠扼杀了“进步”。对赫德的评论认识正确的是