2010年我国西南地区发生严重的旱灾,期间某部队用装有碘化银(化学式为AgI)实施人工降雨,碘化银中碘元素的化合价为 [ ]
A.-1
B.+1
C.+2
D.+5
答案:A
下列语句中,错误的是
A.const int buffer=256;
B.const double *point;
C.int const buffer=256;
D.double * const point;
-What are you doing?
-I'm cutting the wood _________.[ ]
A. on pieces
B. on a piece
C. in pieces
D. in a piece