We wear sunglasses to protect our eyes _____________ the sun.
A:of
B:at
C:for
D:from
“嫦娥四号”与地球间的“通信桥梁”
—How many____can you see in the picture?
—Only one.
体育课上同学们进行爬杆比赛,某同学沿竖立的硬竿匀速向上爬,该同学受到的力中与他所受的重力相平衡的力是