下列账户状态中不可以签约手机银行业务的是()
A.部分冻结
B.部分止付
C.挂失
D.止付
参考答案:C, D
The teacher has a(an) ___________ to get off topic; sometimes it is difficult for students to make out what he is saying.
A.concern
B.determination
C.intention
D.tendency
水泥强度和水灰比是影响混凝土的重要因素。