According to the author, the distinction between violent acts and non-violent ones in sports is ______.
A. impossible to make
B. not very clear in any circumstances
C. too obvious to escape observation
D. not very difficult to make if enough attention is paid to
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服脊髓灰质炎三联疫苗下列哪项做法是错误的
A. 每次服三型白色糖丸一粒，每次隔1个月．共3次
B. 可于1、2、7岁入学前后服1次加强免疫力
C. 乔服糖丸时必须用冷开水送服
D. 发热、活动性肺结核、免疫缺陷者均应忌服本疫苗
E. 为了增强免疫力在口服本疫苗的同时可肌注丙种球蛋白
We can come to the conclusion that______.
A. 60 percent of American children are now born illegitimately
B. at least 50 percent of black children are now born illegitimately in America
C. 60 percent of American children were born illegitimately in the 1960s
D. at least 60 percent of American children were born illegitimately in the 1960s
下列叙述中错误的是______。
A. 计算机不能直接执行用C语言编写的源程序
B. C程序经C编译后，生成后缀为.obj的文件是一个二进制文件
C. 后缀为.obj的文件，经连接程序生成后缀为.exe的文件是一个二进制文件
D. 后缀为.obj和.exe的二进制文件都可以直接运行
能较好反映。肾小球滤过功能的检测指标是
A. 血尿素氮(BuN)
B. 血清肌酐(SCr)
C. 肌酐清除率(CCr)
D. 尿溶菌酶
E. 尿NAG和γ-GT
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