在国际收支平衡表的平衡与结算项目中，最主要的平衡项目是( )。 A．单方转移 B

计算题：某硫磺制酸系统，转化率为99.50%，吸收率为99.95%，其它损失率取0.50%，求生产1吨100%硫酸所耗硫磺的定额是多少？

下图是配制一定质量分数的NaCl溶液的操作过程．请回答下列问题：

（1）指出图中a、b两种仪器的名称：a _________ ，b _________ ．

（2）写出图中的两处错误操作 _________ 、 _________ ．

（3）步骤⑤的操作是搅拌，其操作要领是 _________ ．

四号在（）时会有压力。

A.受到束缚

B.对别人不满

C.找不到感觉

D.与人接触

Odysseus answered well when the priests showed him a picture of those who had honored the gods and then escaped shipwreck, and asked him whether he did not now acknowledge the power of the gods. "Yes," he asked, "but where are those pictured who were drowned after their prayers" And such is the way of all superstitions; wherein humans, having a delight in such vanities, mark the events there they are fulfilled, but where they fail, though this happens much oftener, neglect and pass them by.
Which one of the following contains the error of reasoning described by the author in the passage

A．I have discovered that Friday the 13th really is a day of misfortune. Just this past Friday, the 13th, I locked myself out of the house.

B．Although Napoleon and Alexander the Great were short, Abraham Lincoln and Charles de Gaulle were tall. So short people seek leadership in order to overcome feelings of inferiority.

C．Every semester for the past 15 years, an average of 10 percent of Ms. Elliot’s history students have dropped her course before the exam. So, it seems likely that we can expert 10 percent to drop out this year.

D．No reliable observer has ever actually seen a yeti. The pest evidence seems to be some suspicious tracks.
So I think this search for a yeti is probably a wild-goose chase.

E．(E) I cannot trust my lucky shirt any longer, I wore it to the game today and our team lost.