题目

All morning as she waited for he medical report from the doctor, her nervousness _____.   A. has grown       B. is growing       C. grew           D. had grown 答案：C实验是学习和研究化学的重要手段，具备基本的化学实验技能是探究化学的基础和保证．下图中的实验操作正确的是（　　）A．闻气体气味B．取用块状固体C．滴加液体D．移走蒸发皿