钻孔施工过程中,为防止发生瓦斯超限事故,钻孔作业场所必须要有良好的通风,并安设瓦斯自动报警断电仪
正确
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Thereisn‘tmuchmilk_____isleftinthebottle.
Hewasvery_____togo,buthehadnochoice.
Insummer,shewouldsitinthegardenenjoyingthefreshairandthesmellofthethingsshe______.
Hewouldhavegivenyoumorehelp,ifhe________sobusy.
可累及心肌引发心肌炎的最常见病原体是()