【C19】A．experimentB．testC．examinationD．inspection

【C11】A．experimentB．researchC．surveyD．questionnaire

A．experimentB．researchC．operationD．survey

What is Irans attitude according to the last paragraph？A．give up energy experimentB．welcom

【C2】A．thoughtB．testC．proofD．question

以下选项中合法的用户标识符是()。A.longB._2TestC.3DmaxD.A.dat

以下选项中合法的用户标识符是A.longB._2TestC.3DmaxD.A dat