担负施工、生产、营建等任务的部队（分队）和在企事业单位工作的军人，工作时间通常着（）或者便服。
A、工作服
B、常服
C、作训服
D、便服
参考答案：A
—I called you last night, but nobody answered.
—I _______ dinner with my family in the restaurant.[ ]
A. have
B. had
C. have had
D. was having
尿毒症病人最常见的继发性感染是
A．口腔黏膜溃疡
B．原发性腹膜炎
C．皮肤感染
D．肺部和泌尿系统感染
