There is a______in the upper left corner of the Australia national flag.A.kangarooB.koalaC
There is a______in the upper left corner of the Australia national flag.
A.kangaroo
B.koala
C.tiny British flag
D.star
There is a______in the upper left corner of the Australia national flag.
A.kangaroo
B.koala
C.tiny British flag
D.star
第1题
A.fall...reduce
B.fall...increase
C.rise…reduce
D.change…have no effect on
第2题
As World War I drew to a______in 1918, millions of American veterans returned home.
A.tail
B.near
C.close
D.point
第3题
A.fewer...rise...decline
B.more...decline...rise
C.more...rise...decline
D.fewer...rise...rise
第4题
A.work
B.position
C.career
D.duty
第6题
已知f1(t)=tε(t),f2(t)=ε(t)一ε(t一2),求y(t)=f1(t)*f2(t一1)*δ’(t一2)。
第8题
若f1(t)=e-atu(t),f2(t)=sintu(t),求f1(t)*f2(t).
第9题
A.don't include
B.can't include
C.aren't included
D.haven't included