Many boys enjoy _______ football, basketball or baseball

－ What does the sign over there read － “No person ________ smoke or carry a lighted cigarette, cigar or pipe in this area”

Which do you think is ________, health or wealth？

_______________will not continue if an ongoing operation is changed or deletedA、

在急性髓细胞白血病中，与FAB亚型相关的特异性染色体结构异常主要有_____、_______、_______等。

29．__________ when you are on the bus or bike．

Which do you think is _________________important, health or wealth?

And they can ______their passports______，making leaving or “escaping” virtually impossible.

Either he or I ______to the airport.

Duty is an act or a course of action that people __________you to take by social customs, law or religion.

Hurry up, or you ______ catch the train.

如图为细胞重要的生命活动图解。请据图回答下面的问题。 （1）A、B、C、D中，染色体结构动态变化主要发生在________过程中。 （2）细胞增殖的主要方式是________________。 （3）细胞分化是个体发育的基础，就同一个个体来说，乳腺细胞与心肌细胞的遗传信息____，形态、结构和生理功能不同，这是因为________。 （4）细胞的凋亡由于受到严格的由遗传机制决定的程序性控制，所以也称为____。 （5）对于人体来说，在A、B、C、D四项生命活动中，有积极意义的是____。