依据著作权法,计算机软件著作权保护的对象指______。 A.计算机硬件 B.计算

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问题:

依据著作权法,计算机软件著作权保护的对象指______。

A.计算机硬件
B.计算机软件
C.计算机硬件和软件
D.计算机文档

考点:计算机软件水平考试中级电子商务设计师电子商务设计师
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同学们去划船,男同学有28人,女同学也有28人,每4人坐一条船,一共需租多少条船?

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请仿照示例,在表格中的二个生活警示语中任选一个,简要解释其蕴含的物理知识。

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The incident took place on Sunday,the 25th of June. On that particular day,a south wind had been gusting(劲吹) on and off all morning. It was not strong enough to cause us any concern,so we carried on our daily work, not suspecting what was about to happen.

The storm gave us very little warning. Black clouds loomed over the distant horizon(地平线) so suddenly that we were taken by surprise. Even then,we were not really worried,as the clouds seemed to be moving over our house and towards the distant mountains. Then,just as the clouds had moved inland,the wind suddenly swung around in a full circle and we were facing a major storm.

Instantly,we were busily preparing for the worst. The whole family had experienced such a storm before and everyone remembered the damage it had caused to stock and crops. There was very little we could do about the crops. But we needed to protect the animals in case the river flooded again. My older brother called his sheep-dog and began driving our small flock of sheep to higher ground above the river. If the river flooded,they should be safe there.

In the meantime,my father was mending a shed roof that had partly fallen down after many years of fine service. If the tin flew off,it could damage the house. My younger brother began hurriedly carrying firewood under the shelter. My job was to help Mum board up the windows. If the storm developed into a cyclone(旋风),the boards would protect the glass.

The storm raged for four hours,pouring more rain on us than we had seen in the last five years. As expected,the river broke its banks and came slowly up towards the house and the stock..

Then,just as we were beginning to lose hope,the storm stopped as suddenly as it had begun. The animals were safe,and the roof was still nailed on. “All’s well that ends well ,”said my mother.

56.When the black clouds appeared suddenly in the distance,           .

A. the family were surprised    B. they were extremely worried

C. they were preparing for the worst    D. they faced the storm bravely

57.“There was very little we could do about the crops” indicates that           .

A. little damage would be done to the crops          B. they had everything ready for the crops

C. they felt unable to protect the crops                 D. the crops should be safe enough there

58. The underlined word “ stock” in the third paragraph refers to          .

A. money owned by the family                     B. goods for sale

C. supplies for family use                            D. farm animals    .

59.It can be inferred from what the mother said that          ·

A. they had no damage at all                               B. everything went beyond their expectation

C. everything was under control                   D. the family could have suffered a greater loss

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医用氯化钙常用于合成药物。以工业碳酸钙(含少量Fe3+等杂质)为原料生产二水和氯化钙(CaCl2·2H2O)的流程如下图所示。

(1)写出第①步中碳酸钙与盐酸反应的化学方程式:___________________。

(2)第②步中是否发生化学变化?________(填“是”或“否”)。

(3)操作a的名称是_________,实验室进行该操作时玻璃棒的作用是__________________。

(4)青少年正处于生长发育阶段,需要摄入足够的钙,写出一个合理的补钙方法:_______________。

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走线架接地接地方法为:用一根不小于()的接地线与总地线排连接,各段走线架接头处用()电缆保持电气连通。

A、16mm2,16mm2

B、25mm2,25mm2

C、35mm2,35mm2

D、50mm2,50mm2

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