以下可采取分权管理的（）。 A.复杂的创造性工作 B.大批量生产 C.批量生产 D.

某220kV变电所，总占地面积为12000m2（其中接地网的面积为10000m2），220kV系统为有效接地系统，土壤电阻率为100Ω．m，接地短路电流为10kA，接地故障电流持续时间为2s，工程中采用钢接地线作为全所主接地网及电气设备接地（钢材的热稳定系数取70）。试根据上述条件计算下列各题。

在不考虑腐蚀的情况下，按热稳定计算电气设备的接地线选择下列哪种规格是较合适的？（短路等效持续时间为1.2s）（）

A.40×4mm2

B.40×6mm2

C.50×4mm2

D.50×6mm2

下列哪种水果（蔬菜）适宜空腹吃？（）

A、西红柿

B、香蕉

C、橘子

D、苹果

在公式GDP=C+I+G+（X-M）中，（）。

A.C表示消费支出

B.I表示投资支出

C.G表示政府购买支出

D.（x—M）表示净出口

E.（x—M）表示政府储蓄

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.\

喷气发动机的单位燃油消耗率为：（）.

A.单位时间发动机所消耗的燃油质量

B.发动机每产生一马力的有效功率，在一小时内所消耗的燃油质量

C.发动机每产生一牛顿推力，在一小时内所消耗的燃油质量

D.单位时间内发动机所消耗的燃油质量与空气流量之比