- Is it OK if I take this seat? - Sorry.

题型:选择题

问题:

- Is it OK if I take this seat?

- Sorry. _____.[ ]

A. here you are

B. take it

C. it's taken

D. never mind

考点:日常用语、谚语
题型:选择题
改错题。
Yesterday I was tidy my room. I found an old 1.__________________
box of my father. He gave it to me two years ago. It2.__________________
was real interesting to discover some of my father’s3.__________________
childhood hobbies. He once told me that he wrote for4.__________________
people all over the world, and they sent he letters, too.5.__________________
As a result, he had some wonderful stamp. People also6.__________________
gave him things from different countries, such like a silk7.__________________
fan from Japan but a small model ship from Australia.8.__________________
My father even kept the ticket from his one football match!9.__________________
It made me to think about looking after my collections.  10.__________________
题型:选择题
按要求的方法解下列一元二次方程.
(1)x2-16=0(直接开平方法)
(2)x2-4x-12=0(配方法)
(3)3(x-1)+2(x2-1)=0(因式分解法)
(4)2x2-4x-1=0(公式法)
(5)x2+3=2
3
x
(你喜欢的方法)
题型:选择题

如图所示,已知:

①甲、乙、丙、丁均为前三周期元素的单质,甲、乙、 丙常温下为气体。

②在一定条件下甲与丙和甲与丁都按物质量之比l:3反应,分别生成X和Y,在产物中元素甲呈负价。

③在一定条件下乙与丙和乙与丁都按物质的量之比1:2反应,分别生成Z和W,在产物中元素乙呈负价。

请填空:

(1)W的电子式为      

(2)X与乙催化氧化的化学方程式是______________________________________________;

(3)Y与Z反应的化学方程式是_____________________________________________;

(4)2.4g丁与足量的乙反应生成W放出QkJ的热,则该反应的热化学方程式为                                  

(5)实验室制取丙的离子方程式为                                          

题型:选择题

下图表示某些营养物质在人体内的变化过程,请据图回答问题:

(1)图中的a过程主要是在______中进行的.

(2)图中的b过程叫做______,c过程主要是在细胞的______内进行的.

(3)某同学完成“唾液淀粉酶对淀粉的消化作用”的实验后,写出了如下实验记录:

试管编号加入物质温度(℃)时间(min)加碘液后的现象
淀粉糊、清水3710蓝变
淀粉糊、唾液3710不变蓝
淀粉糊、唾液510 变蓝
若以其中的②和③为一组对照实验,则实验的变量是______.

题型:选择题

按军事运输等级的划分,运费按现付办理的运输属于()运输。

A.特殊运输

B.紧急运输

C.重点运输

D.一般运输

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