(-2)10+(-2)9的值是( )
A.-2
B.(-2)9
C.29
D.29+1
原式=(-2)9×(-2)+(-2)9
=(-2)9×(-1)
=29.
故选C.
Doctors have said that as many as 50% of patients don’t take medicine_______.
A.like directed
B.to be directed
C.as directed
D.so that directed
A.mgtgθ
B.mgsinθ
C.μmg
D.μmg