主电路保护电器复原零位联锁有什么作用？

灌入溶液时应观察病人反应，下列正确的处理方法是

A．如液体流入受阻，可降低灌肠筒高度

B．如液体流入受阻，可拔出肛管重新插入

C．如病人有便意，可降低灌肠筒高度，嘱病人深呼吸

D．如病人有便意，可拔出肛管，待病人休息片刻后重新插入

E．如病人出现脉速、面色苍白、出冷汗，可放慢速度

阅读下面的短文片段，回答问题。

　　刷子李干活还有个规矩。每刷完一面墙，必得在凳子上坐一大会儿，抽一袋烟，喝一碗茶，再刷下一面墙。此刻，曹小三借着给师傅倒水点烟的机会，拿目光仔细搜索刷子李的全身。每一面墙刷完，他搜索一遍。居然连一个芝麻大小的粉点也没发现。他真觉得这身黑色的衣服有种神圣不可侵犯的威严。

　　可是，当刷子李刷完最后一面墙，坐下来，曹小三给他点烟时，竟然瞧见刷子李裤子上出现一个白点，黄豆大小。黑中白，比白中黑更扎眼。完了！师傅露馅了，他不是神仙，往日传说中那如山般的形象轰然倒去。但他怕师父难堪，不敢说，也不敢看，可忍不住还要扫一眼。    

1.曹小三拼命在师傅身上找白点是有意令其出丑吗？

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2.从哪里可以看出曹小三的为人？

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为门诊患者开具地西伴片一般不得超过（）

A.一次常用量

B.3日常用量

C.5日常用量

D.7日常用量

E.15日常用量

　  Life on land probably began about 430 million years ago, though it has stayed in the water for perhaps as much as 3,000 million years. When we think of the first thing on land, we probably think of strange animals coming out of the oceans, but in fact no animals could have been living if plants had not been on land first. Plants had to be on land before animals arrived. They supplied the first land animals with the surrounding and food necessity, since then, the plants, are the only form of life that is able to get and store energy.

　　The first plants to stay out of the water were probably certain kinds of algae（海藻）which were followed by other plants that grew close to the ground and needed water in which to reproduce. Once the move to land had been made, however, evolution（进化）happened quickly. By the end of 100 million years, plants had developed their roots（根), and some had got tree -like forms since height was very important in gaining sunlight. About 300 million years ago, much of the world was covered with forests of huge trees. In most ways they were like modern trees. They had roots, leaves, wood, but mostly they had not developed seeds.

59．The main idea of the first paragraph is ________.

　　A. life on land probably began 430 years ago

　　B. the first animal on land came from oceans

　　C. there wouldn't have been animals without plants

　　D. plants are the only form of life that is able to get and store energy

60．Which of the following statements is true according to the passage?

　　A. Algae probably has stayed for more than 430 million years.

　　B. It is impossible that algae might be the earliest plant on land.

　　C. Plants get food from animals in the oceans.

　　D. Evolution began after animals appeared on land.

61．Plants with roots appeared about ________ million years ago.

　　A. 430　　　　　B. 300　　　　　 C. 330　　　　　 D. 100

62．According to the passage, ________ appeared earlier than ________.

　　A. apples; oranges　　　　　　　　 B. oranges; apples

　　C. oranges; roses　　　　　　　　　D. algae; wheat

什么是统计法？带电作业危险率如何计算？