我国门脉性肝硬化的主要致病原因是
A.病毒性肝炎
B.酒精中毒
C.工业毒物或药物
D.血吸虫病
E.循环障碍
参考答案:A
In spring it is windy in Beijing, _____ in Canada it often rains. [ ]
A. but
B. and
C. to
JX-300XPDCS模拟量输出位号的数据类型()。
A.SFLOAT
B.FLOAT
C.INT
D.BOOL