应激性溃疡突出的症状是
A．上腹剧痛B．反酸嗳气C．心窝部烧灼感D．突然发生上消化道出血或穿孔E．频繁恶心呕吐
参考答案：D
When the old woman was to cross the street, she was knocked down by a car and badly ______.
A．destroyed
B．wounded
C．damaged
D．injured
下列（）硫磺回收尾气处理装置的投资费用最低。
A、SCOT
B、串级SCOT
C、Chinsulf-SDP
D、Superclaus
