word中,当前处于“打印预览”状态,如果要打印文档,必须退出“打印预览”状态,才能打印。( )
A.正确
B.错误
参考答案:错
They asked me to perform a comedy ______ A Trip to Beijing. [ ]
A.called
B.calling
C.calls
D.is called
试述急性盆腔炎的诊断标准。