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Some mammals migrate（迁徒）. One of these is the caribou（驯鹿）. They travel to the tundra（苔原）every summer to eat the rich grasses that grow there. When the weather becomes cooler, they migrate to the warmer forests and spend the winter there. Another mammal that migrates is the humpback whale. They spend the winter in Hawaii, and the summer in the Arctic（北极的）waters. They travel to the Arctic to eat millions of small shrimp（虾）.

Anther habit that some animals have to survive the cold winter is called hibernation. Animals that hibernate, rest or sleep during the winter. While they are hibernating, their bodies use up the fat layer that they have put on by eating large amounts of food during the summer. Some animals that hibernate in the Arctic are small animals called lemmings（旅鼠）, squirrels（松鼠）and bears.

There are two habit adaptations that animals in the Arctic have all year round. These are called herding and pack life. Caribou are example of animals that live in herds. A herd is a group of animals that lives together for most, or all of their lives. A herd of caribou can have a thousand or more animals in it. They live in herds for protection. It is easier for caribou to protect themselves when they are together than it is when they are alone. This is because the meat-eaters hunt in packs.

A pack is a small group of animals that lives together. It is usually controlled by a head male and a female. All the members of the pack must obey them. Packs have a very definite social structure. Each animal in a pack has a different position, or importance. Animals in a pack are usually meat-eaters. They live together for protection and hunting purposes.

小题1:According to the first paragraph, the humpback whale         .

A．travels to the Arctic for shrimp in summer

B．spends the winter in the Arctic

C．lives in Hawaii in summer

D．has the same living habits as the caribou小题2:What kind of animal doesn’t hibernate in the Arctic?

A．The caribou.

B．The bear.

C．The squirrel.

D．The lemming.小题3: Caribou live in herds in order to         .

A．use up their fat layer

B．find food

C．protect themselves

D．hunt in packs小题4: What do we know about pack life according to the last paragraph?

A．Animals in pack are usually grain-eaters.

B．All animals are in an equal position in a pack.

C．It is either controlled by a head mate or by a female.

D．Each animal has its own different role in a pack.

背景材料：

某办公楼基础施工，采用直径l.2m的人工孔桩，桩长l4m，采用混凝土护壁，共35根。

《建筑地基基础工程施工质量验收规范》（GB50202--2002）有关条款见下表1。请根据上述背景资料完成以下选项，选项类型根据各小题注明要求。

（单选题）桩身质量完整性检测为Il类桩，说明（）。

A.桩身完整

B.桩身存在严重缺陷

C.桩身有轻微缺陷.不会影响桩身结构承载力的正常发挥

D.桩身有明显缺陷，对桩身结构承载力有影响

处方开干漆，调配应付（）。

喷雾时未完成排空原因（）.

A、喷雾压力低

B、喷头堵

C、双氧水杯灌注阀堵

D、空气过滤器堵

如图是人类红绿色盲的遗传系谱图，其中5号不携带红绿色盲基因，红绿色盲基因用b表示。请据图分析回答：

9号成员是色盲患者，其致病基因是由（）号传递来的