营业机构的认证管理方式有()。
A.柜员号
B.密码
C.指纹
D.动态口令
参考答案:A, B, C
已知向量a=(2,1),b=(-1,-1),求向量a+2b的坐标。
— Emma failed her exams. I think she should work harder.
— I agree. she does, she'll get good grades.
A. If
B. Because
C. Before
D. Though