中国在北极建立的第一个科学考察站是

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    I have five children．I'm always busy when they're awake(醒着)．That's why I try to get up before everyone else．I get up at 5：00 am．The house is quiet．I drink a cup of coffee and read books．I love that time because it's mine and I can think without interruptions(打扰)．

    —Anna

    I'm a night person．I love the night．I feel sleepy all day and then at night I wake up(醒来)!I like to dance，watch movies or talk to friends at night.I never go to sleep before 2：00a.m.

    —James

    I'm a morning person．As soon as a little light comes through the window,I wake up and start my day．I try to do important work in the morning because I know that I think best at that time．After 1：00pm，I begin to slowdown!

    —Sandra

    I love tea time．I like to have tea in late afternoon．It's a time to stop the day's activities (活动)for an hour and talk with friends．Sometimes,people visit my home-then．Sometimes，I go to a friend's house for tea．

    —Bob

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一块均匀的长方体砖块，分别按图2所示甲、乙、丙三种方式放置在水平地面上，其中对地面压强最大的放置方式是（   ）