怀疑宫外孕时最有价值的辅助检查方法是()
A.尿HCG值
B.血HCG值
C. * * 后穹隆穿刺
D.诊断性刮宫
E.B型超声检查
参考答案:E
As I waited for my brother to arrive, I __________ the clock and saw that he was late.[ ]
A. glanced at
B. stared at
C. watched
D. noticed
系统管理岗人员与实例用户均采取()登录方式,必须明确()职能,各尽其责,切实做好督促和复核工作,以达到安全控制的目的。
A.单人,单方
B.双人,双方
C.双人,单方
D.单人,双方