High in thick bamboo forests in the misty, ____ (rain) mountains of southwestern China ____ (live) one of the world's rarest mammals: the giant panda, also called the panda, Only about 1,000 of these black-and-white ____ (relative) of bears survive in the wild.

    Pandas eat almost nothing ____ bamboo shoots and leaves. ____ (occasion) they eat other plants, fish, or small animals, but bamboo accounts for 99% of their diets.

    Pandas eat fast; they eat ____ lot, and they spend about 12 hours a day ____ (do) it. The reason is ____ they digest only about a fifth of what they eat. Overall, bamboo is not very nutritious. To stay healthy, they have to eat a lot-up to 15 percent of their body weight in 12 hours-so they eat fast.

    Pandas' molars(臼齿) are very broad and flat. The shape of these teeth helps the animals crush the bamboo shoots, leaves, and stems they eat to get the bamboo to their mouths, ____ hold the stems with their front claws, which have enlarged wrist bones that act as thumbs for grasping things. A panda should have at least two bamboo species where it lives, or it will starve. Pandas are shy; they don't go into areas ____ people live. This restricts pandas to very limited areas.

阅读材料，完成下列要求。

材料一：近代以来，中国在外力压迫下为富民强国采取的是倾斜的转型模式，推行“重工业优先发展战略”，大量农村人口和劳动力不能随工业化的发展而就业，导致就业结构的转换落后于产业结构的转换，农业剩余劳动力大量集聚。正如张培刚先生所指出的“工业化的成败与否取决于发展中国家在工业化过程中能否妥善解决农业剩余劳动力的转移与吸纳问题”。

——摘编自魏悦、魏忠《近代以来中国农业剩余劳动力转移思想的历史演进》

材料二：“圈地运动”深刻影响了英国乡村的社会经济条件，带来了土地关系和农业经营方式的变革。自然经济基础逐渐消解，大量失去土地的农民沦为廉价劳动力，资本主义生产关系开始发展，农场成为农村转移劳动力的主要就业场所。除了受雇于农场之外，海外移民是农民的又一种选择。殖民地的拓展吸引大部分人移居美国、加拿大和澳大利亚，继续从事农业生产。总体来看，在这一阶段发生的农村劳动力转移主要表现为农村内部和农业内部的转移，有的主要从事农业生产，有的则亦工亦农，只有少量农民进入城市。

——摘编自王爱华《英国农村劳动力转移及其对中国的启示》

$\sqrt{16}$的算术平方根是（　　）