One of the tennis rackets broken when they found them.[ ]
A. is
B. are
C. were
D. was
答案:D
一列火车载重1884吨,一辆卡车载重6吨,一列火车载重的吨数是一辆卡车的几倍?
杜区护上为社区儿童进行预防接村,此工作属于
A.社区保健服务B.社区临终服务C.社区健康教育D.杜区传染病病人的护理及竹理E.社区急、重症病人的转珍服务