(1)在平面直角坐标系中,将点A(-3,4)向右平移5个单位到点A1,再将点A1

题型:解答题

问题:

(1)在平面直角坐标系中,将点A(-3,4)向右平移5个单位到点A1,再将点A1绕坐标原点顺时针旋转90°到点A2。直接写出点A1,A2的坐标;

(2)在平面直角坐标系中,将第二象限内的点B(a,b)向右平移m个单位到第一象限点B1,再将点B1绕坐标原点顺时针旋转90°到点B2,直接写出点B1,B2的坐标;

(3)在平面直角坐标系中。将点P(c,d)沿水平方向平移n个单位到点P1,再将点P1绕坐标原点顺时针旋转90°到点P2,直接写出点P2的坐标。

考点:图形旋转平移
题型:解答题

小题1:

The use of health supplements such as multivitamin tablets has increased greatly in the western world. People take these supplements because advertising suggests that they prevent a range of medical conditions from developing. However, there is concern that people are consuming worryingly high doses of these supplements and the European Union (EU) has issued a directive that will ban the sale of a wide range of them. This EU directive should be supported.

小题2:

Research suggests that people who take Vitamin C supplements of over 5000 milligrams a day are more likely to develop cancer. This shows how much damage these health supplements do to people’s health. A spokesman for the health supplement industry has argued that other research shows that Vitamin C supplements help prevent heart disease, but we can dismiss this evidence as it is from a biased source.

小题3:

Science fiction of the 1960s and 1970s predicted that pills would replace meals as the way in which people would get the fuel they needed. This, it was argued, would mean a more efficient use of time as people wouldn’t have to waste it preparing or eating meals. The EU directive would help prevent this nightmare of pills replacing food becoming a reality.

小题4:

Peop0le already take too many pills instead of adopting a healthier lifestyle. For example, the consumption of painkillers in Britain in 1998 was 21 tablets per year for every man, woman and child in the country. People do not need all these pills.

小题5:

Some might argue that the EU directive denies people’s right to freedom of choice. However, there are many legal examples for such intervention when it is in the individual’s best interests. We now make people wear seatbelts rather than allowing them to choose to do so. Opposing the EU directive would mean beneficial measures like this would be threatened.

题型:解答题

进口涂料需备案的范围是《商品名称及编码协调制度》中编码为6801、6802项下的商品。( )

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以初级卫生保健为主题的国际医学伦理文件是()。

A.《赫尔辛基宣言》

B.《夏威夷宣言》

C.《阿拉木图宣言》

D.《悉尼宣言》

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绝对剩余价值生产是()

A.个别资本所有者首先改进技术的结果

B.全社会劳动生产率提高的结果

C.在必要劳动时间不变时延长工作日的结果

D.缩短必要劳动时间相应地延长剩余劳动时间的结果

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下列措施中属于二级预防的是()。

A、保健服务

B、婚前检查

C、乙型肝炎表面抗原筛选

D、预防性卫生监督

E、经常性卫生监督

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