下列各项中,属于法律行为的有()。
A.爆发战争
B.重大政策的改变
C.签订合同
D.持票提示付款
参考答案:C, D
解析:选项AB均属于相对事件。
Realizing that he would be late for school, little Tom had ___of the bread prepared by Mum and hurried out.
A.nothing
B.all
C.neither
D.none
关于血管内溶血描述错误的是
A.急性发作
B.血红蛋白血症
C.血红蛋白尿
D.肝脾常肿大
E.多数为获得性