皮皮学，免费搜题
登录
搜题
【多选题】
用一组假想的直线,将空间物体投射到某个几何平面上,形成该物体在几何面的,称为投影,投影可以分为( )两大类。A.
中心投影
B.
平行投影
C.
立体投影
D.
以上都不对
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
【简答题】我们设法 做到恩威并施 。(strike a balance) We try to __________.
【单选题】Task 2 Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45. Depression isn't just feeling down. It's a real illness with real causes. Depre...
A.
a mental state that can be overcome without medicine
B.
an illness that no medicine can cure
C.
an experience everyone has in his life time
D.
something you can avoid by leading a happy life