对不符合技术规范和合同条件要求的工程项目，监理工程师有权暂时拒绝支付。
参考答案：对
Frank, with his two sisters , ______London by train which ______at 8:30 tomorrow morning .[ ]
A. is leaving for ; will leave
B. are leaving for ; leaves
C. is leaving for ; leaves
D. will leave for ; will leave
弹簧测力计拉着重50N的物体在水平面上以0.3m/s的速度作匀速直线运动，弹簧测力计的示数是5N；现在使物体以0.6m/s的速度在原来的水平面上作匀速直线运动，物体受到的摩擦力为（ ）
A．5N
B．10N
C．0N
D．15N
