【单选题】耐高温、耐湿的物品和器材,应首选的灭菌方法为
【判断题】蜗杆传动中,蜗杆的头数越多,其传动效率越低。
【判断题】在蜗杆传动中,蜗杆的头数越多,传动效率越低。( )
【单选题】We require you ______this matter as soon as possible.
【单选题】在社会主义改造中“和平赎买”的对象是( )
【单选题】Excerpt from a letter We require you to look into this matter and have the shop assistant apologize to my friend. Looking forward to hearing from you. The writer is writing a letter of _________.