某同学做了如下实验,把两段绿色枝条按下图装置分别放在甲、乙两个玻璃罩内。在甲瓶玻

题型:读图填空题

问题:

某同学做了如下实验,把两段绿色枝条按下图装置分别放在甲、乙两个玻璃罩内。在甲瓶玻璃罩内放清水,乙瓶玻璃罩内放氢氧化钠溶液(氢氧化钠可以吸收二氧化碳)。把它们放在黑暗中一昼夜,然后移到光下照射几小时,分别剪下一片绿叶,放在酒精里隔水加热,脱去叶绿素,用清水冲洗干净,再滴上几滴碘液。

(1)该实验的假设是__________

A.水是光合作用的原料B.二氧化碳是光合作用的原料C.呼吸作用能产生二氧化碳D.呼吸作用需要氧气

(2)滴加碘液后,在__________装置内剪下的叶片会变蓝。

(3)实验中把两个装置放在黑暗中一昼夜的目的是______________。

考点:光合作用
题型:读图填空题

阅读理解。

     Two men are walking in the park. One is Mr. Brown , a worker, the other is Mr. Black. Mr. Brown

is going to a chair. It is next to the road. Mr. Black is after him. Mr. Brown finds Mr. Black. Now Mr.

Brown begins to walk faster. Because he wants to get to the chair before Mr. Black. Now Mr. Black

begins to walk faster because he also wants to get to the chair first. Then they both run. Mr. Black runs

faster than  Mr. Brown. So he gets to the chair first and sits down on it. Mr. Brown runs after Mr. Black. When he gets to the chair. He sees Mr. Black sitting on it. He is sorry to show(出示) a notice(通知)with

the words"Wet Paint(油漆未干)"to Mr. Black . Now Mr. Black knows why Mr. Brown is going to the

chair.

1. Where are Mr. Brown and Mr. Black?

A. In the garden  

B. On the chair    

C. In the park      

D. Next to the road

2. What are they doing? They are________

A. talking  

B. walking to the chair  

C. holding a notice  

D. sitting on a chair

3..________is after________at first

A. Mr. Black , Mr. Brown

B. The worker, Mr. Brown

C. Mr. Brown ,Mr. Black

D. Mr. Brown The worker

4. ________get to chair first.

A.The worker

B. Mr. Brown  

C. Mr. Black  

D. A  student

5. Mr. Brown goes to the chair because________.

A. he wants to sit there                    

B. it is his chair  

C. he wants to talk to Mr. Black on the chair  

D. he wants to tell people "Wet Paint"

题型:读图填空题

当x∈(-2,2)时,ax<2,a的取值范围是( ).

题型:读图填空题

列举出近代史上的四个著名宣言

题型:读图填空题

张某乘坐长途客车,下列说法错误的是哪项( )

A.从高层卧铺摔下受伤,承运人有尽力救助义务

B.因急刹车被碰伤,承运人有赔偿责任

C.钱包丢失,承运人有赔偿责任

D.托运的行李丢失,承运人应当赔偿

题型:读图填空题

签约合同价不包括()

A.暂列金额

B.暂估价

C.计日工

更多题库