Look! He is in the river. [ ]
A. swiming
B. swim
C. swims
D. swimming
答案:D
下列分析方法,适用于等级资料的是
A.U检验B.F检验C.卡方检验D.相关回归分析E.秩和检验
溶解系指()
A.溶质1g(或1mL)能在溶剂10~30mL中溶解
B.溶质1g(或1mL)能在溶剂不到1mL中溶解
C.溶质1g(或1mL)能在溶剂100~1000mL中溶解
D.溶质1g(或1mL)能在溶剂30~100mL中溶解
E.溶质1g(或1mL)在溶剂10000mL中不能完全溶解