【单选题】管道供应公司发现,它的销售额变化的时间总是在房屋开工指数变化大约4个月之后发生。于是,房屋开工指数就成为管道供应公司预测其市场需求的一个非常有用的( )
【单选题】Sam always has a lot of energy. ___, Nick always seems tired.
【单选题】Sam is a very good man. He always tries __________ best to help others.
【单选题】Sam _____ walks to school. He always goes to school by bike.
【单选题】Sam doesn't like staying in one place, he always like to go _______. [ ]
【单选题】一足月分娩新生儿Apgar评分为9分,出生后第5天,护理评估情况异常的是
【单选题】—Sam speaks English like a native.I always admire him.—Now he is learning more difficult language—
A.
—Sam speaks____ English like a native.I always admire him. —Now he is learning____ more difficult language—Arabic. A.an;a