下列()天气情况下相同面积的太阳能电池组件发电能量最大。
A、阴天
B、雨天
C、雪天
D、晴天
参考答案:D
Our research has focused on a drug which is so () as to be able to change brain chemistry.
A. powerful
B. influential
C. multiple
D. energetic
热轧带肋钢筋力学工艺性能试验时,一组样品数量为()。
A.抗拉2根、抗弯2根
B.抗拉3根、抗弯3根
C.抗拉3根、抗弯2根
D.抗拉2根、抗弯3根