下列装置能构成原电池的是[ ]
A.
B.
C.
D.
答案：B
He became the ________ of criticism by the readers for his newlypublished book.
A．target
B．theme
C．fortune
D．figure
下列不是妊娠期高血压疾病的高危因素的是
A．经产妇
B．孕妇年龄大于40岁
C．低社会经济状况
D．既往妊娠期高血压病史
E．营养不良
