学校保护涉及未成年人的[ ] A．教育和发展 B．人身权利的维护 C．生命安全的

根据课文内容填空

1.The reading passage is two   小题1:  written by an old man called Clancy.

2.It was a time when the killer whales, or “killers” as they were then   小题2: ,helped the whalers catch the baleen whales that were on their   小题3:          小题4: .

3.I thought ,at that time, that this was just a story but then I   小题5:  it with my own eyes many times.

4.There ‘s no   小题6:  or water and even no   小题7:  either! I’m still trying to   小题8:  to these conditions.

5.Science is my most challenging subject as my students have no   小题9:  of doing experiments.

6. Sometimes I wonder how   小题10:  chemistry is to these students, most of whom will be going back to their villages after Year 8 anyway.

一定条件下，给水施加一个弱电场，常温常压下水瞬间结成冰，俗称“热冰”，下列关于“热冰”的叙述不正确的是（　　）

A．利用该性质，人们在常温常压下就可建溜冰场

B．“热冰”的密度比水小，是因为“热冰”中含有大量氢键的原故

C．水凝固为“热冰”所发生的变化为化学变化

D．采用弱电场的条件，说明水分子是极性分子

常用洗胃液高锰酸钾溶液的配制( )。

A．1:(500～1000)

B．1:(1000～2000)

C．1:(2000～5000)

D．1:(5000～10000)

E．1:(5000～15000)

十二指肠淤滞症形成的主要原因是（）。

A.十二指肠动力功能失调

B.肠系膜上动脉压迫

C.先天性畸形

D.十二指肠球炎

E.十二指肠器质性病变

照明平面图标明照明配电箱、灯具、开关和插座的（）。

A.位置

B.安装方式

C.他们间线路连结、编号

D.敷式方法

E.导管尺寸和导线规格