在相同强度情况下合金钢要比碳钢的回火温度高。

用“伏安法测电阻”的实验中，老师提供了以下器材：几节干电池做电源、已知阻值的电阻R_L、最大阻值为50Ω的滑动变阻器1个、被测电阻R_x、开关2个，电压表和电流表各1只、导线若干。实验前老师启发同学们，为了使测定的电阻值更精确，采用多次测量取平均值的方法。甲、乙、丙、丁四个小组分别设计了以下可测电阻R_x的四个方案（如图1），依据实验方案回答：

图1

对于鉴别心肌梗死与心绞痛心电图最有意义的是（）

A.病理性Q波

B.冠状T波

C.T波高耸

D.ST段压低

E.ST段抬高伴高耸T波

The Red Cross is an international organization, which cares for people who are in need of help. A man in a Paris (56) who needs blood, a woman in Mexico who was (57) in an accident, and (58) in India that lost their (59) in a storm may all be (60) by the Red Cross. The Red Cross (61) in almost every country around the (62) The world Red Cross organizations are sometimes (63) the Sun or the Red Lion. All of these organi-zations (64) a common aim of (65) to help people in need.
The idea of (66) an organization to help the sick and wounded during a war was (67) by Joan Dun ant. In 1859, he (68) how people were (69) on a battlefield in Ita-ly. He wanted to help all the wounded people (70) which side they were fighting for. The most important (71) of his work was an international treaty(条约). It (72) prisoners of war, the sick and wounded, and other (73) during a war.
The American Red Cross was (74) by Lara Barton in 1881. Today the Cross in the United States provides a number of (75) for the public.

A．continents

B．cities

C．world

D．universe

局域网的介质有哪几种各自什么特点？

坚持( )的周边外交方针，把同周边国家的互利合作推向新的高度。

A．和平统一、一国两制
B．以邻为本，为邻解围
C．独立自主，高度自治
D．与邻为善，以邻为伴