碱度越大,PH必然越高,说明水中OH-越多。()
参考答案:错
The news made all of us .[ ]
A. surprising
B. surprised
C. to surprising
D. to surprise
旅馆对旅客遗留的物品,应当妥善保管,设法归还原主或揭示招领,经招领()后无人认领的,要送当地公安机关按拾遗物品处理。
A.15天
B.1个月
C.3个月
D.6个月