题目

下列实验操作正确的是（ ） A．连接仪器            B．塞进胶塞   C．倾倒液体               D．过滤 答案：【考点】49：液体药品的取用；4G：过滤的原理、方法及其应用；4J：仪器的装配或连接． 【解答】解：A、导管连接胶皮管时，先把导管一端湿润，然后稍用力转动使之插入胶皮管内，图中所示装置正确。 B、把橡皮塞慢慢转动着塞进试管口，切不可把试管放在桌上在使劲塞进塞子，以免压破试管，图中 短文改错：下面短文中的划线部分可能是错误的，如果是错误请改正，如果正确请打√，并将答案写在右边相应题号后的横线上。（每空只写一词，并不得改变原句意思。）                   例：We often visit the museum last year .    答案　visited　　 How do north americans dress? What do they wear in special               1           days? In fact, there is very few formal days, though there are some             2           festivals such as Easter,Christmas, Halloween, or Thanksgiving                3           day. What people wear depend on their likes and dislikes. on birthday,         4           some child wear paper party hats. At Christmas, some people wear              5           Santa Claus hats. In winter, Canada people usually wear coats, gloves,         6                  boots and hats. It is near the same in northern china. generally, people          7           in Canada and the United States wear suits for work in offices, as              8            well as for most formal occasions, just as people do in china. People           9           in cities around a world wear rather similar clothes.                                10