动物易发生出血性梗死的器官是（）。
A.心
B.肝
C.脾
D.肾
E.胃
参考答案：C
—I had very good grades in English this time.
—____________.
A. Congratulations B. Best wishes D. Good luck D. Come on
墙体砌筑时，在预留构造柱位置旁的两侧墙体上竖向每隔（）留一皮砖高的无砂浆竖缝。
A.50mm
B.500mm
C.100mm
D.1000mm
