九年级开展以“文明出行”为主题的综合实践活动。活动中有一些问题，请你参与解决。

王强把自己出生的月份乘以31，再把出生的日期乘以12，然后加起来，总数是170，王强的生日是____。

人们经常在草坪上行走，会造成土壤板结，从而影响草的生长。土壤板结影响植物生长的主要原因是（　　）

阅读理解B
    Are friends important to you?They are really important to me．My name is Phil and I'm 13．I'm from London．I have a very good friend.His name is Max．
    Max and I have a lot ofthings in common(有共同之处):our birthdays are on the same day；we are in the same class；we both love dogs；we are both good at sports and soccer is our favorite…. We always have a good time together．
    But these days I'm not happy．Max will leave England，because his father gets a job in Shanghai．Max's family will go there．I have a lot to talk with Max．and I want to give him an album(相册)．There are a lot of our photos in it．
    Today is Monday．There are only three days before Max leaves．I will go to his home to give him the album this evening．
根据材料内容简要回答下列问题。

一杯酒精倒出一半，剩余酒精的质量、密度、比热容和热值的变化情况是（   ）