多为老年患者,突然发病,下腹痛,呕吐,血性腹泻,病变多发生在结肠脾区:()
A.溃疡型结肠炎
B.缺血性肠炎
C.细菌性痢疾
D.假膜性肠炎
E.慢性阿米巴肠炎
参考答案:B
-----I found it hard to get along well with Tina.
-----Set aside________ you disagree and try to find_________ you have in common.
A.what; what
B.whether; what
C.what; whether
D.where; what
胆碱是一种强有机碱,是______磷脂和______磷脂的组成成分。