We don't have school ____ Saturdays ____ Sundays. [ ]
A. from; to
B. on; or
C. on; and
答案:B
0.7×0.7的积用四舍五入法保留一位小数约是0.5.______.(判断对错)
女性,30岁,患风湿性心瓣膜病二尖瓣狭窄。3天前感冒,发热、咳嗽,咯黄白粘痰,给予抗生素静滴,按3ml/min的速度输入,在输液中患者突感呼吸困难,频频咳嗽,咯粉红色泡沫样痰。查体:Bp90/60mmHg,呼吸32次/分,心率126次/分,双肺满布干湿啰音。
抢救中对其治疗无益的是()
A.去甲肾上腺素
B.吗啡
C.静注呋塞咪
D.静注氨茶硷
E.静点硝酸甘油