新生儿出生后感染性肺炎的特点以下哪项不妥()
A.发病时间多在3天以后
B.口吐白沫
C.可有气急、鼻扇、吸气时三凹征阳性
D.诊断靠肺部听到细湿啰音
E.体温正常或不升
参考答案:C
His writing is so confusing that it's difficult to make out ________ it is he is trying to express.(2011·安徽)
A.that
B.how
C.who
D.what
下面属于操作系统的是
A.C语言
B.UNIX系统
C.Word
D.Excel