—Nothing special. I stayed at home and watched a film called Paddington 2.

根据短文理解，完成下列各题。

    Tom is five years old. He has no brothers or sisters. He is a lovely boy. He doesn't go to school because he is too young. He likes to play with other children in the small park every day.

    The park is near his building. In the park there are interesting things to see and play with.

    Tom's parents love him very much. They often buy him nice things. This time, his mother buys some new clothes for him. The clothes are expensive and nice. Tom is very happy to wear them.

    “Mum, can I go out and play with my friends? I want them to see my new clothes,” asks Tom. “All right, but please keep your clothes clean,” says Mum. “I am going to do some cooking. We will have supper after your father comes back.” At about six, his father comes back from work. And Tom goes home for supper.

    “Why do you have much earth (泥土) on your clothes?” asks his mother.

    “Because I have some falls(摔跤), ” answers Tom. “You should not make the nice clothes dirty” Mother says.

    “I'm sorry, Mum” says Tom, “But I have no time to take off my clothes when I fall.”

电影《可可西里》展示了人与藏羚羊的感人故事，同时也让我们更加关注藏羚羊及其生存状态。藏羚羊是我国的特有物种，它的羊绒比金子还贵重，是国家一级保护动物。请你在阅读下列资料后回答问题。

资料一：藏羚羊生活在海拔5 000米左右的高原，群居生活，食草为生，能耐严寒，藏羚羊血液中红细胞含量高，天性机警，听觉和视觉发达，体态轻盈，一听到异常声音便放蹄疾奔，常出没在人迹罕至的地方，极难接近。由于有强健匀称的四肢，藏羚羊具有善奔跑的特点，奔跑速度可达每小时70千米，即使是妊娠期满临产的雌藏羚羊，也会以较快的速度疾奔，这在其他草食动物中是少见的。藏羚羊出生两小时以后，就可以快速奔跑。除了奔跑外，藏羚羊还有其他逃避敌害的办法。在雌藏羚羊分娩后的初期，如果遇到敌害或其他异常情况，它们会立即将还不会走动的新生儿叼到一个隐蔽的地方，然后慢慢地从比较显眼的地方离开，以吸引敌害的注意力，直到它认为安全了，才匆忙回到隐蔽处寻找新生儿。而出生的幼仔在这期间一动不动，不易被天敌发现。

资料二：几种动物的心脏比较表：

酵母菌不同于细菌的结构是（　　）