空集没有子集．______．

热继电器手动复位时间不大于（）min。

A、2

B、5

C、8

D、10

工业上用CaSO₄、NH₃、CO₂制备硫酸铵晶体(NH₄)₂SO₄，过程如下图所示。

（1）硫酸铵在农业生产上的一种用途是______，它属于     （填“酸”、“碱”或“盐”）。

（2）操作①中需要使用的玻璃仪器有     ；从滤液中得到硫酸铵晶体，正确操作顺序是

    →     →     （填序号）。

a．过滤          b．加热浓缩          c．冷却结晶  

（3）用CaSO₄、NH₃、CO₂制备硫酸铵的化学方程式是    。

Though England was on the whole prosperous and hopeful, though by comparison with her neighbors she enjoyed internal peace, she could not evade the fact that the world of which she formed a part was torn by hatred and strife as fierce as any in human history. Men were still for from recognizing that two religions could exist side by side in the same society; they believed that the toleration of another religion different from their own. And hence necessarily false, must inevitably destroy such a society and bring the souls of all its members into danger of hell. So the struggle went on with increasing fury within each nation to impose a single creed upon every subject, and within the general society of Christendom to impose it upon every nation. In England the Reformers, or Protestants, aided by the power of the Crown, had at this stage triumphed, but over Europe as a whole Rome was beginning to recover some of the ground it had lost after Martin Luther’s revolt in the earlier part of the century. It did this in two ways, by the activities of its missionaries, as in parts of Germany, or by the military might of the Catholic Powers, as in the Low Countries, where the Dutch provinces were sometimes near their last extremity under the pressure of Spanish arms. Against England, the most important of all the Protestant nations to reconquer, military might was not yet possible because the Catholic Powers were too occupied and divided: and so, in the 1570’s Rome bent her efforts, as she had done a thousand years before in the days of Saint Augustine, to win England back by means of her missionaries.

These were young Englishmen who had either never given up the old faith, or having done so, had returned to it and felt called to become priests. There being, of course, no Catholic seminaries left in England, they went abroad, at first quite easily, later with difficulty and danger, to study in the English colleges at Douai or Rome: the former established for the training of ordinary or secular clergy, the other for the member of the Society of Jesus, commonly known as Jesuits, a new Order established by St, Ignatius Loyola same thirty years before. The seculars came first; they achieved a success which even the most eager could hardly have expected. Cool-minded and well-informed men, like Cecil, had long surmised that the conversion of the English people to Protestantism was for from complete; many—Cecil thought even the majority—had conformed out of fear, self-interest or—possibly the commonest reason of all—sheer bewilderment at the rapid changes in doctrine and forms of worship imposed on them in so short a time. Thus it happened that the missionaries found a welcome, not only with the families who had secretly offered them hospitality if they came, but with many others whom their first hosts invited to meet them or passed them on to. They would land at the ports in disguise, as merchants, courtiers or what not, professing some plausible business in the country, and make by devious may for their first house of refuge. There they would administer the Sacraments and preach to the house holds and to such of the neighbors as their hosts trusted and presently go on to some other locality to which they were directed or from which they received a call.

小题1: The main idea of this passage is

[A]. The continuity of the religious struggle in Britain in new ways.

[B]. The conversion of religion in Britain.

[C]. The victory of the New religion in Britain.

[D]. England became prosperous.

小题2: What was Martin Luther’s religions?

[A]. Buddhism. [B]. Protestantism. [C]. Catholicism. [D]. Orthodox.

小题3: Through what way did the Rome recover some of the lost land?

[A]. Civil and military ways. [B]. Propaganda and attack.

[C]. Persuasion and criticism. [D]. Religious and military ways.

小题4:What did the second paragraph mainly describe?

[A]. The activities of missionaries in Britain.

[B]. The conversion of English people to Protestantism was far from complete.

[C]. The young in Britain began to convert to Catholicism

[D]. Most families offered hospitality to missionaries.

提醒购物是指（）

A.那些无购物目的的购买行为

B.企业的促销活动影响了顾客的需求

C.企业提供购买者预定的购物计划日程表

D.购买者还需要根据各种条件，如制造商，来最终明确所购买的商品

在对压力表进行日常维护时，若生产装置停车，应将压力表与取压口之间的切断阀（）。