下列关于水利水电施工企业安全防护设施管理的说法正确的是（）。 A.临水和水上作业有可

剩余法评估中，（）项目应计算利息。

A.地价

B.销售税费

C.工商登记费

D.投资利润

以下关于急性根尖周炎的病理变化说法正确的是（）。

A.可直接由急性牙髓炎向根尖周扩展而来

B.临床上称为急性牙槽脓肿

C.突破口的位置常靠近唇颊侧牙龈

D.脓肿中心为坏死液化的组织和脓细胞

E.以上全对

腺垂体产生的是（）

A．生长素释放抑制激素

B．降钙素

C．1，25-（OH）2-VD3

D．生长激素

E．生长素介质

（9分）从C、H、O、N、S、P、Cl、Na、、Ca、Fe、K、Ag、Cu等13种元素中选择恰当的元素，用离子符号、化学式或化学方程式按下列要求填空：

（1）3个碳酸氢根离子_________  （2）磷酸钠中磷元素显+5价___   ___

（3）含三种元素的汽车燃料是__________；（4）含硫元素的氮肥是_____   _；

（5）实验室制取二氧化碳                   （6）中和反应

（7）有氧化物参加的还原反应               （8）有单质银生成的置换反应

（9）有钾肥生成的复分解反应  

A proven method for effective textbook reading is the SQ3R method developed by Francis Robinson. The first step is to survey (the S step) the chapter by reading the title, introduction, section headings, summary and by studying any graphs, tables, illustrations or charts. The purpose of this step is to get an overview of the chapter so that you will know before you read what it will be about. In the second step (the Q step), for each section you ask yourself questions such as "What do I already know about this topic" and "What do I want to know" In this step you also take the section heading and turn it into a question. This step gives you a purpose for reading the section. The third step (the first of the 3 R’s) is to read to find the answer to your questions. Then at the end of each section, before going on to the next section, you recite (the second of the 3 R’s) the answers to the questions that you formed in the question step. When you recite you should say the information you want to learn out loud in your own words. The fifth step is done after you have completed steps 2, 3 and 4 for each section. You review (the last of the 3 R’s) the entire chapter. The review is done much as the survey was in the first step. As you review, hold a mental conversation with yourself as you recite the information you selected as important to learn. The mental conversation could take the form of asking and answering the questions fromed from the headings or reading the summary, which lists the main ideas in the chapter, and trying to fill in the details for each main idea.

According to the passage, the first step helps the readers（）

A. read first several paragraphs

B. scan the whole chapter

C. study the graphs

D. get the theme of the chapter