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（10分）【地理—环境保护】阅读材料，完成下列各题。 2014年2月22日前后几天，雾霾天气笼罩中国中东部大部地区。据有有关监测显示，在此期间，北京、河北、山东等多地空气中PM2.5指数直逼最大值（严重超标）。PM2.5是指大气中直径小于或等于2.5微米的颗粒物，也称为可入肺颗粒物，主要来自扬尘、机动车尾气、燃煤及挥发性有机物等，它对空气质量和能见度等有重要影响。 (1)试分析此次多地PM2.5指数严重超标的原因。（4分） (2) 针对目前状况，在个人以及政府层面，你对防范该天气有什么建议？（6分）
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【单选题】Heart rate of 2-year-old child is
A.
60~70 times per minute
B.
80~90 times per minute
C.
100~ 120 times per minute
D.
130~140 times per minute
E.
150~160 times per minute
【单选题】The 6-year-old child is old enough_______ himself.
A.
to dress
B.
to wear
C.
dresses
D.
wears
【单选题】Under no circumstances ______ be left alone at home.
A.
a three-year-old child should
B.
should a three-year-old child
C.
a three-year-old child should not
D.
should a three-year-old child not
【简答题】Martin is a fif-year-old boy. He used to be a “problem child”, but a recent communication with his mother changed his life. In the past, He didn’t give his mother many problems. , after his father...
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