以下哪项不是推动珠江三角洲城镇体系快速发展的主要因素( )。A．拥有桑基鱼塘等丰富

生活中毒时，毒物进入人体最常见的途径是（）

A.创口

B.皮肤

C.消化道

D.呼吸道

E.黏膜

[1]Why is physical education important for students? There are many reasons. First of all, this subject helps them achieve the primary goal of physical education, which is physical fitness. As part of this, they can learn that it is highly important to include exercise and physical activities as part of their lifestyle.

[2]Physical education helps children achieve a healthy lifestyle. Inside the classroom, teachers educate kids about highly relevant issues such as the importance of hygiene (卫生) and health. This subject will help them realize the importance of having strong bodies. Likewise, it will also teach them how to have a healthy and an active lifestyle.

[3]Taking PE classes can help              of students. Being confident is very important to them as they grow and become responsible as well as competitive adults someday. This aspect (方面) of physical education is extremely important in the character development of students. Furthermore, it will teach them how to have a positive attitude.

[4]Physical education can teach students a set of all-important values. For example, it teaches students to fight like sportsmen and to cooperate with others to achieve one common goal as a team.

[5]Physical education also helps students develop their motor skills. On this kind of program, they are placed in situations where they can further develop and improve their reflexes (反应), concentration and body posture. By taking this class, they can realize their full potential as individuals and as part of a team.

[6]Moreover, physical education is also a means of enjoyment for students. By engaging in sports and physical activities, they can spend some pleasant time away from their other usual academic subjects. By doing so, they can achieve healthy minds and bodies.

小题1:What’s the text mainly about? (no more than 6 words)

小题2:What does the underlined word “it” (Line 3 paragraph 2) probably refer to? (no more than 3 words)

小题3:Fill in the blank in Paragraph 3 with proper words. (no more than 4 words)

小题4:Based on the text, list two values that students can learn in PE classes. (no more than 6 words)

小题5:How can a student keep healthy physically and mentally? (no more than 9 words)

压力表在使用或检定时，由于（）等因素的影响所引起的误差，能定量的应加以修正

A、温度变化

B、安装位置

C、工作介质和读数方法

D、以上三项

研究购买过程的目的是鼓励营销人员将注意力集中于购买决策，而不是购买过程。

CO变换操作中，如原料气中的N2含量过高，会使炉温迅速升高，导致催化剂超温、甚至烧结。