A:is it that; ranged from
B:are there what; ranging from
C:is it that; ranging from
D:are there what; ranged from
下表是司机驾驶小汽车时,在水平、干燥的沥青路面上以不同速度行驶时的统计数据 .
Dear Jenny, Please take these things to your brother: his math book, baseball, notebook, CDs, and video tape. The math book is on the dresser. The baseball is under the bed. The notebook is on the bed. The CDs are in the drawer. The video tape is on the table. Thanks! Mom
①西部和北部少数民族内迁 ②北方黄河流域的农民大批南迁
③东南沿海居民迁往南洋各地 ④北方黄河流域人民迁往长城以北
腔肠动物和扁形动物的共同特征是( )