第二章单元测试
- The relation between
and 
is （ ）. - Let
, 
. Then 
（ ）. - Suppose that the vectors
and 
are collinear, and 
. Then 
. （ ） - Given a point
, the symmetric point of 
about 
-plane is 
. （ ） 
is a surface of hyperbolic cylinder parallel to z-axis. （ ）
A:The line lies in the plane B:The line is parallel to the plane C:The line is perpendicular to the plane
答案:The line is parallel to the plane
A:
B:
C:
答案:
A:错 B:对
答案:对
A:对 B:错
答案:错
A:错 B:对
答案:对
