Livinginthewildcanbehard.Findingfoodandstayingsafearen’...

问题详情：

Living in the wild can be ing food and staying safe aren’t day，animals struggle to survive in their all animals get by on their animals form a close partnership with other kinds of e pairings are called symbiotic (共生的) relationships.

In a symbiotic relationship，the animals depend on each animal helps the other meet its ds good，right? Not animals are not very kind to their some cases，one animal meets its needs but hurts its ticks，for e insects suck blood to get blood，they attach themselves to other kinds of s can pass germs that cause disease instead of helping their hosts.

In other relationships，animals don’t treat their partners so animals benefit from living with the other animals.

Small animals called cleaner shrimps have found a way of helping fish at coral their name suggests，the shrimps clean the hang out at what scientists call a cleaning station.A fish stops a shrimp climbs onto the fish and even steps into the fish’s shrimp uses its tiny claws to pick stuff off the fish’s can include dead skin，tiny pieces of food，and wee creatures that can hurt the fish gets a nice shrimp enjoys a tasty meal of fish trash.

Small birds called plovers are also in the cleaning have big customers—s have long snouts (鼻子) filled with sharp ning them is a croc opens its mouth，the plover hops right croc does not snap its snout ead，it lets the plover eat small，harmful animals attached to the crocodile’s plover gets an easy meal while the croc gets clean teeth.

41．The text is mainly about ________.

A．the hard life in the wild

B．some dangerous animals

C．animals living together

D．animals in a symbiotic relationship

42．According to the text，in a symbiotic relationship，______.

A．animals depend on each other

B．birds depend on animals for food

C．both sides can get help

D．not all animals treat their partners well

43．Why do the cleaner shrimps clean the fish?

A．To get fish trash for food.

B．To eat wee creatures.

C．To help fish go out of coral reefs.

D．To get food for fish.

44．When plovers hop into crocodiles’ mouths，they ________.

A．are really to clean crocodiles’ teeth

B．are to make crocodiles happy

C．aren’t afraid of being eaten

D．aren’t happy to clean the crocodiles’ teeth

45．According to the text，it can be inferred that ______.

A．living in the wild can be hard

B．different animals have different living ways

C．crocodiles mainly live on plovers

D．ticks are useful to some animals

【回答】

DDACB

知识点：科普环保类阅读

题型：阅读理解