一枝铅笔用去5厘米3毫米后剩13厘米,这枝铅笔原来长多少毫米?
13厘米+5厘米3毫米,
=18厘米3毫米;
=183(毫米);
答:这枝铅笔原来长183毫米.
Tom took the police to the spot ________ the accident happened.[ ]
A. which
B. that
C. where
D. when
Sharpey纤维是指()。
A.一端埋在牙槽骨,一端埋入牙龈
B.一端埋在牙槽骨,一端埋入牙骨质
C.一端埋在牙槽骨,一端埋入牙周膜
D.一端埋入牙骨质,一端埋入牙周膜
E.一端埋入牙髓,一端埋入牙龈