A:脂肪、蛋白质
B:蛋白质、脂肪
C:糖类、蛋白质
D:蛋白质、糖类
在初中即将毕业之际, 请你以张明的名义给英国笔友Brian写一封感谢信, 要点提示如下:
three years ago
a new comer, have no friends and feel lonely…..
During three years
Brain have written many letters to help you in different ways:
Encourage you to make more friends.
Tell you the ways how to learn English well
…….
You have changed a lot, for example, ……..
invite him to come to Hangzhou to pay a visit…….
要求:
①词数:80--100个
②信的开头和结尾已给出, 不计入总词数
③要点齐全, 行文连贯, 可适当发挥
Dear Brian,
How time flies! We have been friends for three years. I'm writing to thank you for your help!
Three years ago, ……
Hope to see you soon!
Yours,
Zhang Ming
在一次抽样调查中收集了一些数据,对数据进行分组,绘制了频数分布表,由于操作失误,绘制时不慎把第三小组的频数弄丢了,现在只知道最后一组(89.5~99.5)出现的百分比为15%,由此可知丢失的第三小组的频数是____。
分组
49.5~59.5
59.5~69.5
69.5~79.5
79.5~89.5
89.5~99.5
频数
9
15
?
16
12