下列有关纬线的叙述中,不正确的是[ ]
A.所有纬线的长度都相等
B.所有纬线都是一个圆圈
C.纬线指示东西方向
D.地球仪上有无数条纬线
答案:A
The teacher felt very glad at the great ________ the students made in their studies.[ ]
A. search
B. progress
C. strength
D. treasure
( ).
A.
B.
C.
D.