災(zāi)難:國民警衛(wèi)隊(duì)協(xié)助加州撲火
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- 劍橋雅思9
科學(xué)60秒:淚糖代替血糖?
People with diabetes may have to endure multiple, painful finger sticks every day to get blood samples for testing. But a new glucose test may do away with the pain even as it brings on the t...
環(huán)境保護(hù):地球日當(dāng)天華盛頓呼吁使用低耗油車
環(huán)境保護(hù):地球日當(dāng)天華盛頓呼吁使用低耗油車On this Earth Day, Washington is calling for more fuel-efficient cars and trucks. The standards would require new vehicles to average 31.6 miles per gall...
晨讀美文057
晨讀美文The time is now near at hand which must probably determine whether Americans are to be freemen of slaves; whether they are to have any property they can call their own; whether their ho...