题目内容:
LakeNyosandLakeMonounexplodebecause
A.thegasesrisetothetopandmixwithai B.peoplefromthevillagesturnoverthewate
C.scientistshaveputinacomputersyste
D.theyhavemoregasestrappedatthebottomthanothercraterlakes
参考答案:
答案解析: