a few, take photos, be on a school trip, wait for, go back, on sale
理想变压器的原、副线圈中一定相同的物理量有( )
完形填空。
This is a photo 1 a classroom. It's2 classroom. Look 3 the walls (墙). They4 white. You can see5old photo 6 the wall. What can you see7 the photo? This is 8 desk. 9 English book is on it. These are 10. They're on the desk too.