输液器应每24h更换1次，输血器应每输一袋更换一次，污染或怀疑污_爱下问搜题

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问题判断题

输液器应每24h更换1次，输血器应每输一袋更换一次，污染或怀疑污染或完整性受到破坏时，应立即更换。

答案

参考答案：错

选择题

电阻R₁、R₂与交流电源按照图所示甲方式连接，R₁＝10 Ω，R₂＝20 Ω.合上开关S后，通过电阻R₂的正弦交变电流i随时间t变化的情况如图乙所示．则 (　　)

A．通过R₁的电流有效值是1.2 A

B．R₁两端的电压有效值是6 V

C．通过R₂的电流最大值是1.2A

D．R₂两端的电压最大值是6V

完形填空

One day while sitting in the boat fishing, I noticed a field mouse on the river bank. He ran out of his 21 , ran around a bit and then ran back. I thought of the 22 of this mouse. His life is spent running around, 23 , following his nose. He runs here, runs there, turns in circles, but never really sees much beyond his 24 . He is trying to 25 his way to successful living, which is finding a little 26 , so that he can carry on for the rest of his life, frightened.
A few minutes later I looked up and noticed an osprey (鱼鹰) 27 high in the sky. This keen-eyed hunter with a 28 view of the river was simply waiting for the best time to catch his food. The 29 creature flew up toward a nest at the top of one of the tallest trees.
It is the osprey not the field mouse that 30 our human potential (潜能). I don’t know about you, but it is 31 for me to decide which creature I want to learn from. I want to 32, to see the big picture, to climb higher, go farther, dive deeper, and 33 more. I want my soul enlarged and my heart inspired. I want to 34 running about following my nose and instead I want to find new strength, fresh 35 , clear vision and courage. I want to be more like the osprey and less like the field mouse, for to live like the field mouse is to ruin my potential.

A．interesting

B．frightening