制备点源的要求是（） A.点源直径>5mm B.点源直径 C.点源直径 D.点源强度

铅蓄电池的工作原理为：Pb+PbO₂+2H₂SO₄2PbSO₄+2H₂O，研读下图，下列判断不正确的是

A．K闭合时，d电极反应式：PbSO₄+2H₂O=PbO₂+4H⁺+SO₄^2-+2e^-

B．当电路中转移0.2 mol电子时，I中消耗的H₂SO₄为0.2 mol

C．K闭合时，Ⅱ中SO₄^2-向c电极迁移

D．K闭合一段时间后，Ⅱ可单独作为原电池，d电极为正极

Directions: Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words.

This was no ordinary class. The students who came together were all science or engineering professors at Cornell University. They had interrupted their research to accept an invitation to take part in an unusual experiment: “an interesting week of poetry”. This class was part of a study to answer the questions: Why is science difficult for many non-science students?

The students in the poetry class listened to lectures and took notes. They had reading tasks and had to write three short papers. All students noticed one thing—the importance of spoken words. In science and engineering classes, the instructors put tables and drawings on the blackboard. But in this poetry class, the instructors just talked. They didn’t write anything on the board.

The scientists and engineers noticed one similarity between science and poetry. In both subjects, students need to find layers of meaning. Some layers are simple, clear, and on the surface; other layers are deeper and more difficult. This search for different levels of meaning doesn’t happen much in undergraduate science classes, but it is important later, in graduate school. And it is always important in humanities(人文科学).

Both the poetry instructors and their students learned something about teaching from this experience. One poetry instructor, for example, now sees the importance of using informational charts as he teaches. Most of the scientists agreed on several points. First, humanities classes might help science students to see patterns and decide which information is important. Second, the poetry class was fun. One engineer decided, “We need to change the way we teach engineering to make it an enjoyable experience for students.” But perhaps the most important result of the experience was this: All of the professors began to think about how they teach and how they can teach better.

（Note： Answer the questions or complete the statements in NO MORE THAN TWELVE WORDS.）

小题1:Why was this class very unusual?

小题2:The experiment was designed to help teachers find out ________.

小题3:The poetry class was different from science and engineering classes in that __________.

小题4:What influence did the experiment had on those professors?

仿句。

      大海，是一坛用文字在千万年里酿造的清酒。每一掬，都有屈原《楚辞》里感天动地的忧愁幽思；_________________________；_____________________________ 。

在下列贸易术语中，属于货物风险自该货物在装运港平安越过装运船只船舷时发生转移的有：（）

A.FCA

B.FOB

C.CIP

D.CIF

E.CFR

（）是指组织根据其生产任务和员工的工作效率以及出勤率的因素来计算人员数量的方法。

A.比例定编定员法

B.工作岗位定编定员法

C.设备定编定员法

D.效率定编定员法