It's time for us ______ lunch. Let's go.[ ]
A. for have
B. to have
C. have
D. to
答案:B
小儿肺炎喘嗽X线检查少见()
A.透亮度降低
B.透亮度增强
C.斑片状阴影
D.肺纹理增粗
E.肺门区结节状阴影
检修时圆弹簧圆钢直径腐蚀、磨耗大于()时更换。
A、0.05
B、0.08
C、0.1
D、0.2