()是在伦理上受试者可以承担的风险
A.受试者身心可承担的风险
B.研究者合理估算的风险
C.不高于常规医疗风险的风险
D.一般人可以承担的风险
参考答案:C
Let's stop______, I know a good restaurant near here.[ ]
A. to have a meal
B. to have a rest
C.having a rest
D. having a meal
在煤堆上和船舶中可以单独采取全水分煤样。