题目

—Is there ________ in the classroom? —No. All of them have gone to the laboratory. A.everyone    B.anyone    C.everything    D.anything 答案：B九月的怀文校园，鲜花盛开，香远益清，阵阵花香，沁人心脾。花香四溢的现象说明（ ）A.分子具有质量B.分子可以分解成原子C.分子体积很小D.分子在不断地运动