粉末中有分枝状石细胞、油细胞和厚壁纤维的中药材是
A．厚朴
B．肉桂
C．杜仲
D．黄柏
E．香加皮
参考答案：A
Before the final examination, many students have shown ____ of tension. Some have trouble in
sleeping while others have lost their appetite. [ ]
A. anxiety
B. marks
C. signs
D. remarks
数据流量短信提醒服务中的阀值、定期提醒服务和查询服务的资费方式为（）。
