Everyone ____ going to bring gifts. [ ]
A. is
B. are
C. am
答案:A
下列叙述中错误的是()
A.距原子核越远的电子结合能越小
B.结合能与原子序数无关
C.电子的结合能越大,从原子内移走电子所需要的能量越大
D.结合能是原子能级的负值
E.激发和电离都能使原子的能量状态升高
— When and where was the famous Chinese player bom?
— He was born ______ July1981 ________ Ji'nan.
[ ]
A. at, in
B. in, at
C. in, in
D. on, in