以下哪项不宜火煅()
A.代赭石、石膏
B.朱砂、琥珀
C.石决明、珍珠母
D.磁石、礞石
E.牡蛎、龙骨
参考答案:B
(2013·高考浙江卷)Half of ________ surveyed in 16 countries say they go first to their closest friend to share their deepest wishes and darkest fears.
A.these
B.some
C.ones
D.those
室性期前收缩心电图的特征不包括()
A.提前出现的QRS波群
B.宽大畸形的QRS波群
C.不完全代偿间歇
D.QRS波群前无P波
E.完全代偿间歇