以下哪项不是肠系膜动脉粥样硬化的表现()
A.腹痛
B.肠道张力减低
C.便秘
D.消化不良
E.便血
参考答案:E
.-----It’s reported that over 1 billion people watched the live opening ceremony of______2010 South Africa World Cup on TV.
-----Yes, news came as______ shock to me.
A.the; the
B./; a
C.the; a
D.a; the
实验室里由粗盐制备精盐的实验中,必需的操作步骤有 [ ]
A.溶解
B.过滤
C.分液
D.蒸发浓缩