普通V带的线速度应验算并限制在()范围内。
A.5m/s~10m/s
B.10m/s~15m/s
C.15m/s~20m/s
D.5m/s~25m/s
参考答案:D
A大厦入伙之初,管理处考虑到业主客户乔迁初期开支较多,主动优惠,对大多数户内维修暂时采取了无偿提供的方式(若当初就把这一想法向业主客户讲清楚,恐怕办了好事也不会惹出后来的麻烦)。入伙满一年后,鉴于小区的经济运行状况,管理处决定按照法规规定,开始据实收取户内维修费用。然而这本来合情合理的做法。却遇到了不小的阻力。
请问如果你是该项目经理。你准备如何突破阻力,把入室维修工作引入正轨?
—We've spent too much money recently.
—Well, it isn't surprising. Our friends and relatives()around all the time.
A. are coming
B. had come
C. were coming
D. have been coming