点P(2﹣a,2a﹣1)到x轴的距离为3,则a为[ ]
A. 2
B. ﹣2
C. 2或﹣1
D. ﹣1
答案:C
The train ____ at present speed until it reaches Beijing.
A.is running
B.will be running
C.will have run
D.has run
女,49岁,月经不规律6个月,伴 * * 干涩,入睡困难、夜间潮热和出汗。妇科检查: * * 皱襞减少,弹性下降,宫颈光滑,子宫正常大小,双附件正常。
考虑诊断应为()
A.围绝经期综合征
B.经前期综合征
C.抑郁症
D.甲亢
E.功血