水果店有苹果253千克,比梨的2倍多29千克,有梨多少千克?
2x+29=253
2x+29-29=253-29
2x=224
2x÷2=224÷2
x=112
答:有梨112千克.
The two girls are so alike that strangers find________difficult to tell one from the other.
A.it
B.them
C.her
D.that
横式采样器采样后,提升仪器出水时,应停留片刻,使仪器()水流淋滴。
A、悬索
B、测杆
C、体内
D、体外