2、区时的计算：同在东时区或同在西时区，区时之差等于区号之差；分别在东西时区，区时之差等于区号之和。

1、地方时的计算：经度每相差15⁰地方时相差1小时，每相差1⁰地方时相差4分钟，较东地区的地方时较早。

　　　　　　　　　　 My opinion on copying others’ homework

It is known to us all that some students copy others’ homework.

90. ___________

89. __________

you soon. Best wishes to you and your family.　　　　　　

88. __________

for writing to me. I’m looking forward to hear from　　　　

87. __________

your country is quite different from me. Thanks again　　　

86. __________

lot from each other. Yes, it is clearly that your life in　　　

85. __________

for several months. We have got to know but learned a　　

84. __________

sent it to me. How time flies ! Our friendship has lasted