There's not just one reason why kids can't fall asleep, though, so there's also more than one____.

    If there's anything about your room that makes you feel ____ at night, like a picture that looks strange in the dark, or a noisy tap that leaks drop after drop, be sure to ask one of your parents if it can be moved or fixed.

    It may not____ make sense why something bothers you, but if it's keeping you from sleeping, it should be changed. Another idea could be getting ready for bed earlier than usual. Try to take more time to ____ by taking a warm bath, or listening to a bedtime story at least30 minutes before you want to go to sleep.

下面相关人体血液循环的叙述中正确的是（    ）

如图，将三角尺ABC（其中∠ABC＝60°，∠C＝90°）绕B点按顺时针方向转动一个角度到A₁BC₁的位置，使得点A，B，C₁在同一条直线上，那么这个角度等于（   ）