【判断题】导游员进行导游活动中不得购买旅游者的物品。( )
【简答题】配制牛肉膏蛋白胨琼脂培养基的原料有哪些___、___、___、___和___。
【判断题】可修复废品指经过修复可使用且修复费经济合算的废品。
【单选题】下列有关绝热、吸声(隔声)材料内容中,哪一项是错误的( )。
A.
矿渣棉导热系数约0.052,不燃、价格低,但吸水性大、弹性小
D.
墙体单位面积质量增加一倍,则墙体的隔声量增加10dB
【单选题】Let me give you a_________of how the camera works.
【简答题】听对话,选择正确答案。 1. Who is calling? [ ] A. Mary. B. Mike. C. Mary's husband. 2. Why will Mike hold a party? [ ] A. He has got a new car. B. He has passed the exam. C. He has moved. 3. When will the...
【单选题】—Could I borrow your camera? —________, but please give it back by Saturday.
【单选题】--Could I borrow your camera? --______, but please give it back by Satureday.
【判断题】 摄氏温度是等比量表的一种形式。( )
【判断题】导游员进行导游活动,不得购买旅游者的物品。()