电线遇到大风,会嗡翁的响,这是由于______产生的.

题型:填空题

问题:

电线遇到大风,会嗡翁的响,这是由于______产生的.

考点:声音的产生
题型:填空题

( )是凭样品采购,即以样品表示标的物品质,并以样品作为交货依据的采购关系。

A.凭样品采购的物品采购合同

B.分期付款的物品采购合同

C.试用的物品采购合同

D.招标投标的物品采购合同

题型:填空题

活塞在气缸内作直线运动,要转换成曲轴的旋转运动,并从曲轴对外输出动力是通过()实现的。

A.曲轴

B.连杆

C.活塞

题型:填空题

下列患者自控镇痛(PCA)不包括的是

A.患者自控静脉镇痛
B.患者自控硬膜外镇痛
C.皮下PCA
D.蛛网膜下腔自控镇痛
E.神经干旁阻滞镇痛

题型:填空题

When I was growing up, I was embarrassed to be seen with my father. He (1) severely crippled and very short, and when we would walk together, his hand on my arm (2) balance, people would stare. I would inwardly be afraid (3) squirm at the unwanted attention. If he ever noticed or was bothered, he never let (4) .
It was difficult to coordinate (5) steps - his halting, mine impatient - and because of that, we didn’t say much as we went along. But as we started out, he always said, "You (6) the pace. I will try to adjust to you. "
Our usual walk was to or (7) the subway, which was how he got to (8) . He went to work sick, and (9) nasty weather. He almost never missed a day, and would (10) it to the office even if (11) could not: a matter of pride!
He never talked about himself as an object of pity, (12) did he show any envy of the more fortunate or able. What he looked for in others was a "good heart", and if he found one, the owner was good enough for him.
Now that I am older, I believe that is a proper standard (13) which to judge people, even though I still don’t know precisely (14) a "good heart" is. But I know the times I don’t have one myself.
He has (15) gone many years now, but I think (16) him often. I wonder if he sensed my reluctance to be seen with him during our (17) . If he did, I am (18) I never told him how sorry I was, how unworthy I was, how I regretted it. I think of him when I complain about trifles, when I am (19) of another’s good fortune, when I don’t have a "good heart".
At such times I put my hand on his arm to regain my (20) , and say, "You set the pace, I will try to adjust to you.\

题型:填空题

碳酸盐岩储层油田水矿化度比碎屑岩储层油田水矿化度低。()

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