当香蕉被挂在高处，黑猩猩徒手拿不到时，它会尝试着把几个木箱堆叠起来，然后爬到木箱顶上去摘香蕉．试分析回答：
（1）黑猩猩的这种行为属于 行为．
（2）刚出生不久的幼猩猩能否完成这种行为？
（3）幼猩猩要完成这种行为，需要通过生活经验的积累和 而获得．
（1）学习；（2）不能；（3）学习
题目分析：（1）动物生来就有的，由动物体内的遗传物质所决定的行为，称为先天性行为．例如：蜜蜂采蜜，喜鹊建巢，蜘蛛织网，鸟类迁徙等，先天性行为是动物的一种本能行为，不会丧失．后天性行为是动物出生后通过学习得来的行为，通过生活经验和“学习”逐渐建立起来的新的行为，黑猩猩的这种行为是后天通过经验和“学习”逐步建立起来的行为，属于学习行为．
（2）刚出生不久的幼猩猩因为生活经验不足，学习能力差，因此不能完成这种行为．
（3）幼猩猩的这种行为属于学习行为，这种行为是动物出生后通过学习得来的行为，通过生活经验和“学习”逐渐建立起来的新的行为．
| Congress makes the laws in the United States. It has two parts, which are more or less equal in power. They are known as the House of Representatives and the Senate. The House of Representatives is larger than the Senate whose 100 members (two from each state) serve for six years. The 435 members of the House are elected every two years, and the number from each state is determined by the population of the state. For example, California, which has a large population, has 43 representatives, while the State of Nevada has only one. The House and Senate are divided into small groups which take care of special matters such as education or foreign affairs. The most important work of Congress is often done in these groups, which are called subcommittees. According to the Constitution of the United States, a senator must be at least 30 years old and he must have been a citizen of the United States for nine years at the time of his election. To be elected to the House a person must be 25 years old and must have been a United States citizen for seven years. At the present time, members of Congress include businessmen, farmers, teachers, and especially lawyers. In general, senators are better known than representatives because they are fewer in number and serve for a longer time. Many American presidents served in Congress before they became president. |
In the U.S. Congress, the House of Representatives and the Senate are______.
A．not equal. The House is more powerful
B．almost equal in power
C．not equal. The Senate is far more powerful
D．different. The House is more important