下列酸碱盐之间的转化不能一步完成的是[ ]
A.Fe(OH)3→Fe2(SO4)3
B.H2SO4→CuSO4
C.Na2CO3→NaOH
D.BaSO4→Ba(NO3)2
答案:D
The old farmer,________ the badly-injured and wounded soldier, came out of the burning house, ________for help.
A.supporting; calling
B.supported by; called
C.being supported by; called
D.being supporting; called
下列哪项不是胎儿宫内生长迟缓的病因()
A.多胎妊娠
B.TORCH综合征
C.胎儿染色体异常
D.孕妇严重营养不良
E.轻度妊娠期糖尿病