28.3的小数点向右移动一位,所得的数比原数大______倍.
283÷28.3-1,
=10-1,
=9倍;
故答案为:9.
—Mum, I’ m going to Maria’ s birthday party this evening. —______.
A.Why not
B.Good idea
C.Come back early
D.Have a good time
已知z1=2+i,z2=1+2i,则复数z=z2-z1对应的点在第几象限[ ]
A.第一象限
B.第二象限
C.第三象限
D.第四象限