在温度 T 时,纯液体 A 的饱和蒸气压为 ,化学势为 ,并且已知在大气压力下的凝固点为 ,当 A 中溶入少量与 A 不形成固态溶液的溶质而形成为稀溶液时,上述三物理量分别为 , 和 ,则( )。
A.
, ,
B.
, ,
C.
, ,
D.
, ,
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【单选题】Part I Multiple Choice Questions (1’ x10) Indicate the best answer for each question by circling the correct letter. 1. When using visual aids in a speech, you should __________.
A.
draw graphs and charts on the chalkboard
B.
display visual aids only while discussing them
C.
pass visual aids among the audience at the start of the speech
D.
not worry about maintaining eye contact with the audience
【单选题】In many African and Asian cultures, avoidance of eye contact can indicate respect rather than discomfort or a lack of interest. This example illustrates the importance of ________.
【判断题】In the United States and in many parts of Europe, direct eye contact is considered as a means to express interest, to indicate trust in the other person and to convey openness.