四冲程内燃机工作循环的四个行程中,有()行程作功。
A、1个
B、2个
C、3个
D、4个
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口头医嘱正确的执行方法是( )
A.医生签名后执行
B.护士长签名后执行
C.两名护士核对后执行
D.护士向医生复述,双方确认无误后执行
列车制动机为一次缓解型,J2-7型空气制动机客货车转换阀手柄置于客车位时,当制动管有漏泄,或白阀置于常用制动区后误将手把在制动区向左移动时,会使列车制动机 发生()。
A.自然制动
B.自然缓解
C.无法缓解
放线菌在固体培养基上呈辐射状生长而得名。它的菌丝体可以分三类:(),气生菌丝和()。
While attending a conference, I returned to my hotel room late one evening. The overhead light outside my door was burned out and I had finding the keyhole. When I to open the door, I around the wall for a light switch. I found a plate where a switch was installed... but no switch! Not discouraged easily, I remembered a lamp by the bed when I deposited my luggage in the day. I found the bed in the and then the lamp, but when I switched it on, nothing ! I thought that perhaps if I opened the curtains I might be able to use whatever light comes in from the to find another lamp. So I my way slowly across the room to the curtains and... no drawstring(拉绳)! I finally stumbled(跌跌撞撞地走)around I found a desk lamp which actually ! That evening I discovered in a whole new way just how dark the world be and how necessary light is! But even more necessary than light is the light that shines from people --the light of and faith. Because, for many people, the world is a dark and place. For someone today just may be stumbling in discouragement or sadness or fear and in of some light. So let your light shine. Whatever light you may be a beacon(灯塔) of hope and encouragement. And if you feel that your light is a candle in a forest remember -- there isn’t enough darkness in all the world to the light of one small candle.
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围手术期术前30分钟滴注的常用抗菌药是()
A.头孢菌素类
B.克林霉素
C.左氧氟沙星
D.氨基糖苷类
E.万古霉素