1.
The square root of 4 is
(
)
A.
B.
2
C.
D.
2.
The following operations are correct
(
)
A.
B.
C.
D.
3. The median of the following calculation results
for
Yes
(
)
A.
B.
C.
D.
4.(-3x+ 1)(-2x)
be qualified for sth
(
)
A.-6 times
-2 times
B.6x
-2 times
C.6x
+2 times
D.- 12x