联通电视可实现哪些功能()
A.直播
B.回放
C.点播
D.回看
E.120多路频道
参考答案:A, B, C, D, E
Liu Hulan would rather________in face of the enemy.[ ]
A.die than to give in
B.die than giving in
C.die than give in
D.have died than have given in
影响和易性的主要因素有()。
A.用水量、水泥浆用量、砂率
B.水泥浆用量、砂率、外加剂
C.外加剂、组成材料的品种与性质、施工条件
D.混凝土设计强度、砂率、外加剂