已知p与q互为相反数,且p≠0,那么下列关系式正确的是( )。
A:pq=1
B:qp=-1
C:p+q=1
D:p-q=0
已知向量a→=(﹣1,3),b→=(x,2),且a→∥b→,则x=( )
下列图示实验操作中,正确的是( )
Time
What to do
On Saturday morning
I have a ____ in a big store.
On ____afternoon
I walk dogs.
On Sunday morning
I have to ____my little sister.
On Sunday ____.
I watch a ____.