皮皮学，免费搜题
登录
搜题
【单选题】
用两顶尖装夹工件时，可限制（）A.
三个移动三个转动
B.
三个移动两个转动
C.
两个移动三个转动
D.
两个移动两个转动
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】What is the greatest threat to the survival of tigers?
A.
The demand for their fur.
B.
Habitat loss.
C.
The demand for traditional medicine containing tiger bone.
D.
The loss of their prey.
【单选题】What is the main reason for plants and animals being endangered?
A.
Climate change
B.
Habitat destruction
C.
Poaching(偷猎)
D.
Predators(食肉动物)
【简答题】欧阳修在《梅圣俞诗集序》里提出“______”之说。
【单选题】What point does the professor make about the Nightcap Oaks habitat?
A.
It is stable despite its limited size.
B.
Unlike the habitats of many plants, it is expanding.
C.
Its recent changes have left the Nightcap Oak struggling to adapt.
D.
Its size is much larger than the area where the Nightcap Oak grows.
【单选题】What is the main idea of the passage?
A.
The passage tells us why sharks are dangerous to people.
B.
The passage tells us the habitat and migration of sharks.
C.
The passage introduces the basic information about sharks.
D.
The passage introduces the evolutional process of sharks.
【单选题】What is the main idea of the talk?
A.
Forest management agencies have eliminated forest fire.
B.
Fire contributes to the beauty and mystery of the forest.
C.
Fire revitalizes the forest and promotes a diversity of life.
D.
Forest fire limits the amount of habitat taken by humans.
【单选题】What is the talk mainly about?
A.
The characteristics of dart-poison frogs.
B.
The habitat of dart-poison frogs.
C.
The role of dart-poison frogs in their ecosystem.
D.
The various ways dart-poison frogs can camouflage themselves.
相关题目：