随时消毒是
A．一级预防B．二级预防C．三级预防D．一级或者二级预防E．二级或者三级预防
参考答案：A
使青藏高原成为我国夏季最冷是由以下哪个因素造成的？[ ]
A、纬度位置
B、海拔太高
C、人类活动
D、地球形状
____ the pressure from work, teachers have to deal with psychological problems caused by interpersonal relationship.
A．As far as
B．As long as
C．As well as
D．As soon as
