地面气象观测场周围观测环境发生变化后要进行详细记录。新建、迁移观测场或观测场四周的障

有机物分子式的确定常采用燃烧法，其操作如下：在电炉加热下用纯氧气氧化管内样品，根据产物的质量确定有机物的组成。如图所示是用燃烧法测定有机物分子式常用的装置，其中A管装碱石灰，B管装无水CaCl₂。现准确称取1.80 g有机物样品(含C、H元素，还可能含有O元素），经燃烧被吸收后A管质量增加1.76 g，B管质量增加0.36 g。请按要求填空：

（1）此法适宜于测定固体有机物的分子式，此有机物的组成元素可能是________。

（2）产生的气体按从左到右的流向，所选各装置导管口的连接顺序是________。

（3）E和D中应分别装有何种药品________。

（4）如果将CuO网去掉，A管增加的质量将________(填“增大”“减小”或“不变”）。

（5）该有机物的最简式是________________。

（6）要确定该有机物的分子式，还必须知道的数据是________。

A．消耗液体E的质量            B．样品的摩尔质量

C．CuO固化减少的质量          D．C装置增加的质量

E．燃烧消耗氧气的物质的量

（7）在整个实验开始之前，需先让D产生的气体通过整套装置一段时间，其目的是_________________________________________________________________。

根据短文内容及所给首字母提示写出所缺单词, 使短文意思完整，每空一词。

A new supermarket put on a notice at the entrance. It said, “Remember, once a week, one of our customers will get f 小题1:  goods. This may be your lucky day.” All the housewives w 小题2:went to the supermarket wanted to be the lucky customer.

In the following several weeks, Mrs Black a 小题3: did shopping in the same supermarket. Unlike many other customers, she never gave up h 小题4: . Her kitchen was full of things that she did not need. She d 小题5:  of the day when the manager of the supermarket would come and say to her, “Madam, this is your lucky day and e小题6:  in your basket is free.”

One Friday morning, after she f小题7:  her shopping and had taken all the things to her car, she realized that she had f小题8:  to buy some tea. She went back to the supermarket to buy the tea. As she was w 小题9:  at the cashier, the manager of the supermarket came to h 小题10:  and said, “Congratulations. Madam! You are our lucky customer and all that you put in your basket is free!”

请简述制定绩效目标的原则。

66，79，93，108，( )

A．121

B．120

C．122

D．124

对氧气瓶和乙炔瓶的安全防护包括（）。

A.不能紧靠存放

B.不能靠近热源存放

C.应在竖直位置用带子或链捆扎固定

D.并列使用时，两个减压阀不能成相对位置