已知数据:2,-1,3,5,6,5,则这组数据的众数和极差分别是 [ ]
A.5和7
B.6和7
C.5和3
D.6和3
答案:A
第四部分:写作(共三节, 满分30分)
第一节: 单词拼写(共10 小题;每小题1分, 满分10分)
66、Too much sugar can be h_______ to children’s teeth.
67、If you don’t stop making that noise, I’m going to lose my p_________.
68、Let me know the time of your a________ so that I can meet you at the airport.
69、The students are not allowed to enter the sound lab without the teacher’s p_________.
70、It was f________ for Jane that she met the good doctor when she needed him.
71、She was ashamed of her children’s bad __________(举止).
72、Jill _________(逐渐地) realized the importance of having a good knowledge of English.
73、 Mr Brown is a highly __________(尊重) journalist in the city.
74、 She is such an __________(精力充沛) woman that she is always active in everything.
75、Be aware of your own _________(强项) and weaknesses.
液体蒸发速度变快的因素有()。
A.液体表面积增大
B.液体温度降低
C.液面上气体扩散加快
D.液面上气体压力增加