（北京20日综合电）周五（20日）是24节气中的大寒，中国东北部分地区从凌晨起受到极寒气候侵袭。在冷空气影响下，黑龙江漠河在上午7时48分测得气温摄氏零下50度是当地自1969年后首次气温降至零下50度。
此外，中国天气预报中心也提醒，未来3天内，内蒙古东北部和黑龙江北部部分站点可能挑战同期最冷纪录。
《中国天气网》报导，除了漠河，20日早晨，黑龙江呼中、北极村及内蒙古图里河等地也极其寒冷，分别出现了零下48.1度、零下47.1度的低温。
专家提醒，在极端低温下，心血管、气喘等心肺功能较差的病人以及对气温变化较敏感的民众，尽量不要外出，同时，习惯使用煤气、煤炉取暖的家庭一定要注意取暖设备安全，严防一氧化碳中毒。
文：综合报导
图：互联网
SQL: Array
(
[0] => Array
(
[query] => SELECT * FROM "wp_posts" WHERE "post_name" = :MeD0_mK AND "post_type" = :MeD1_mK AND "post_status" = :MeD2_mK LIMIT 1
[params] =>
[time_ms] => 0.736952
)
[1] => Array
(
[query] => SELECT tt.term_id as tagid from wp_term_relationships tr
left join `wp_term_taxonomy` tt On tt.term_taxonomy_id = tr.term_taxonomy_id
WHERE tt.taxonomy IN ('post_tag')
AND tr.object_id = 3283932
[params] =>
[time_ms] => 0.443935
)
[2] => Array
(
[query] => SELECT "wp_terms"."term_id" AS "term_id","wp_terms"."name" AS "name","wp_terms"."slug" AS "slug","wp_terms"."term_order" AS "term_order","wp_term_taxonomy"."description" AS "description","wp_term_taxonomy"."parent" AS "parent","wp_term_taxonomy"."count" AS "count","wp_term_taxonomy"."taxonomy" AS "tax" FROM "wp_terms" LEFT JOIN "wp_term_taxonomy" USING ("term_id") WHERE "wp_terms"."term_id" = :MeD3_mK AND "wp_term_taxonomy"."taxonomy" = :MeD4_mK LIMIT 1
[params] =>
[time_ms] => 0.208139
)
[3] => Array
(
[query] => SELECT "meta_key","meta_value" FROM "wp_postmeta" WHERE "post_id" = :MeD5_mK
[params] =>
[time_ms] => 0.411987
)
[4] => Array
(
[query] => SELECT * FROM "wp_posts" WHERE "wp_posts"."ID" = :MeD6_mK AND "wp_posts"."post_status" = :MeD7_mK LIMIT 1
[params] =>
[time_ms] => 0.338078
)
[5] => Array
(
[query] => SELECT * FROM "wp_posts" WHERE "wp_posts"."ID" = :MeD8_mK AND "wp_posts"."post_status" = :MeD9_mK LIMIT 1
[params] =>
[time_ms] => 0.227928
)
[6] => Array
(
[query] => SELECT * FROM "wp_posts" WHERE "wp_posts"."ID" = :MeD10_mK AND "wp_posts"."post_status" = :MeD11_mK LIMIT 1
[params] =>
[time_ms] => 0.231981
)
[7] => Array
(
[query] => SELECT tt.term_id as tagid from wp_term_relationships tr
left join `wp_term_taxonomy` tt On tt.term_taxonomy_id = tr.term_taxonomy_id
WHERE tt.taxonomy IN ('post_tag')
AND tr.object_id = 3283932
[params] =>
[time_ms] => 0.2141
)
[8] => Array
(
[query] => SELECT "wp_terms"."term_id" AS "term_id","wp_terms"."name" AS "name","wp_terms"."slug" AS "slug","wp_terms"."term_order" AS "term_order","wp_term_taxonomy"."description" AS "description","wp_term_taxonomy"."parent" AS "parent","wp_term_taxonomy"."count" AS "count","wp_term_taxonomy"."taxonomy" AS "tax" FROM "wp_terms" LEFT JOIN "wp_term_taxonomy" USING ("term_id") WHERE "wp_terms"."term_id" = :MeD12_mK AND "wp_term_taxonomy"."taxonomy" = :MeD13_mK LIMIT 1
[params] =>
[time_ms] => 0.210047
)
)
Redis: Array
(
[0] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => post_info:3283932
[2] => info
)
[time_ms] => 0.23
)
[1] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => category_info:all
[2] => info
)
[time_ms] => 0.6
)
[2] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => ZRANGE
[1] => termlist139333
[2] => 0
[3] => 7
)
[time_ms] => 0.23
)
[3] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => post_info:4964368
[2] => info
)
[time_ms] => 0.18
)
[4] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => post_info:4756386
[2] => info
)
[time_ms] => 0.19
)
[5] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => post_info:4677865
[2] => info
)
[time_ms] => 0.19
)
[6] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => post_info:4663454
[2] => info
)
[time_ms] => 0.18
)
[7] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => post_info:3317542
[2] => info
)
[time_ms] => 0.15
)
[8] => Array
(
[command] => RAW
[arguments] => Array
(
[0] => HGET
[1] => post_info:3229643
[2] => info
)
[time_ms] => 0.17
)
)
