对健康人和儿童预防接种的方法是
A、人工主动免疫A
暂无解析
Touristexpenditureshavedifferenteffectsonadestinationeconomy:salesbyfoodvendorstorestaurantsare_______effect;whiletaxifaresandairlineticketsalesare_______effect.
Importswillbeallowedinproportion_______exports.
Sofarscientistshaveonlyacquired________understandingofthephysicalprocessesthatcauseearthquakes.
Shewas________beunabletospeak
Wearepleasedtoinformyouthattheitemyourequestedcanbesupplied______stock.
