上腹部搏动最可能的原因是()
A.左心房肥大
B.左心室肥大
C.右心室肥大
D.右心房肥大
E.心肌炎
参考答案:C
设NA代表阿伏加德罗常数的值,下列说法不正确的是( )
A.阿伏加德罗常数NA是0.012kgl2C中所含的原子数
B.2g氢气所含氢原子数目为NA
C.标准状况下,11.2LNH3所含的原子数目为0.5NA
D.含71gNa2SO4的溶液中所含Na+离子数目为NA
—Is that _ _ schoolbag? —No. __ _is white.
A.his, His
B.her, His
C.he, His
D.her, Her