对脉动流,气体涡轮流量计的测量结果通常偏().
A.高
B.低
C.强
D.弱
参考答案:A
It was in Beihai Park___they made a date for the first time____the old couple told us their love story.
A.that; that
B.where; when
C.that; when
D.where; that
含钙、镁、铁类金属离子的中药是()
A.龙骨与牡蛎
B.石膏与瓦楞子
C.明矾与海螵蛸
D.石决明与赭石
E.龟甲与鳖甲