【单选题】欲比较某县正常成年男性的血红蛋白含量是否高于该省正常水平,应采用
【简答题】这是一道填空题,不过设置为客观题,所以答案是_
【单选题】欲比较某县正常成年男性的血红蛋白含量是否高于该省正常水平,应采用
【简答题】一个人从某地向东走了100m,反回头又向西走了80m。从出发点算起,他的位移大小是 m,位移的方向 ,他的 路程是 m。
【单选题】We can infer from the last paragraph that in the dining-car______.
A.
the waiters were snobbish
B.
the couple felt ill at ease
C.
the service was satisfactory
D.
the couple enjoyed their dinner
【单选题】Mary didn't come to our party yesterday because she was busy preparing for the exam. We all felt sorry _____ her.
【简答题】一个人从某地向东走了100m,反回头又向西走了80m。从出发点起,它的位移大小是___m,位移的方向_____,他的路程是_____m
【简答题】一个人从某地向东走了 100m ,反回头又向西走了 80m 。从出发点算起,他的位移大小是 m ,位移的方向 ,他的路程是 m 。