问答题：指出下面句法结构中斜体的词的词性。（6分）请你过来有（要）事相商。

题型：选择题

下列是关于函数y=f(x)，x∈[a，b]的几个命题：
①若x₀∈[a，b]且满足f(x₀)=0，则(x₀，0)是f(x)的一个零点；
②若x₀是f(x)在[a，b]上的零点，则可用二分法求x₀的近似值；
③函数f(x)的零点是方程f(x)=0的根，但f(x)=0的根不一定是函数f(x)的零点；
④用二分法求方程的根时，得到的都是近似值；
那么以上叙述中，正确的个数为

A．0
B．1
C．3
D．4

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题型：单项选择题

消防竖管的管径应根据在建工程临时消防用水量、竖管内水流计算速度进行计算确定，且不应小于（）。

A．DN80

B．DN100

C．DN120

D．DN160

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题型：阅读理解

Young people can have problems with their minds. Some students become worried because they have to study very hard. Others have trouble getting on well with people like their parents and classmates.

Liu Wei, a Junior 2 student from Hefei, could not understand his teacher and was doing badly in his lessons. He became so worried about it that he started to cut his finger with a knife. Another student, 14-year-old Yan Fang from Guangzhou, was afraid of exams. She got very worried in the test, and when she looked at the exam papers, she couldn’t think of anything to write.

A recent report from Jiefang Daily says about 18% of Shanghai teenagers have mental problems. Their troubles include being worried and very unhappy, and having problems in learning and getting on well with people. Many students who have problems won’t go for advice or help. Some think they will look stupid if they go to see a doctor. Others don’t want to talk about their secret.

Liang Yuezhu, an expert on teenagers from Beijing Anding Hospital has the following advice for teenagers.

1). Talk to your parents or teachers often.

2). Take part in group activities and play sports.

3). Go to see a doctor if you feel unhappy or unwell.

小题1:The students who often become worried or have trouble getting on well with others may have___________.

A．a headache

B．mental problems

C．knives with them

D．no parents小题2:Liu Wei cut his finger with a knife because____________.

A．he was afraid of his teacher

B．he wanted to frighten his parents

C．his finger was badly hurt

D．he was so worried about his study小题3:Yan Fang’s problems happened whenever ______________.

A．she studied very hard

B．she talked with her parents

C．she had exams

D．she thought of something小题4: Students who have problems won’t ask others for help because _____________.

A．they won’t let others think they are stupid

B．they don’t think doctors can help them

C．they don’t want to tell their secret to others

D．both A and C小题5:Liang Yuezhu’s advice tells us that_________________.

A．it’s unnecessary for them to be with others

B．it’s better for the students who have mental problems to join others

C．only group activities and sports can help them

D．teachers and parents can’t do anything about mental problems

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题型：多项选择题

经纬仪主要由（）组成

A.基座

B.水准器

C.望远镜

D.水平度盘

E.照准部

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题型：单项选择题

哮喘的高发时间是

A．午夜12时
B．凌晨0～2时
C．凌晨3～4时
D．凌晨5～6时
E．早晨7时

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指出下面句法结构中斜体的词的词性。（6分）请你过来有（要）事相商。

题目：

答案：