参与构成足横弓的骨是（）。A.距骨 B.跟骨 C.足舟骨 D.骰骨 E.第1跖骨头

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       Three kids have been learning chemistry for only a few months. But they have already begun to

challenge a world famous scientist!

       Li Weichi, Huang Runling, and Xiao Yan are from Zhongshan Huaqiao Middle School in Guangdong. They have just found a red cabbage that could be a new kind of acid-base indicator (酸碱指示剂). They want it to take the place of litmus (石蕊) paper.

       "We've learnt to think of and ask questions about life by ourselves," said Li, "We work well with each other."

       British scientist Robert Boyle discovered the use of litmus paper over 300 years ago. Now it is used widely in experiments all over the world.

       But when the kids did some experiments in class last winter, they saw that the litmus paper didn't turn very blue with base matter. It's hard to get a clear result.

       Will there be a better indicator than litmus paper? The three kids decided to try and find out!

       How? They went to collect over 40 plants in parks, gardens and markets. Then they ground (研磨)

leaves, flowers and stems (茎) to get the pigments (色素) from them.

       The kids mixed pigments with acid and base. They spent months watching carefully to see which

paper showed the best colour change. They decided it was the litmus paper!

       "It's our first scientific journey, Huang said, "But it makes me want to try harder."

1. Whom did the three kids want to challenge?

A. Their chemistry teacher.    

B. Their headmaster.

C. Robert Boyle              

D. Thomas Edison

2. From the text, a red cabbage is a kind of ____.

A. plant

B. animal

C. paper

D. liquid

3. What's the right order for the following sentences?

a. Three kids collect red cabbage everywhere.

b. The kids mixed pigments with acid and base.

c. The kid ground the red cabbage.

d. The kids get pigments from it.

A. a-b-c-d

B. b-a-c-d

C. a-c-d-b

D. b-c-d-a

4. What is widely used as the acid-base indicator now?

A. red cabbage            

B. litmus paper

C. any plant                

D. any flower  

5. The story mainly tells us ____.

A. how to make litmus paper    

B. about the three kids' spirit

C. scientist were wrong        

D. the kids are heroes

企业取得下列各项金融资产时，其所发生的相关交易费用应直接计入当期损益的是 ( )。

A．划分为交易性金融资产在取得时所发生的交易费用

B．划分为可供出售金融资产在取得时所发生的交易费用

C．划分为贷款和应收款项的金融资产在取得时所发生的交易费用

D．划分为持有至到期投资的金融资产在取得时所发生的交易费用

下列关于嗜铬细胞瘤的说法不正确的是（）

A.多见于男性

B.大多位于肾上腺的一侧

C.大多数病例如能及早诊治，可以治愈

D.肾上腺髓质的嗜铬细胞瘤主要分泌去甲肾上腺素

E.肾上腺外的嗜铬细胞瘤除主动脉旁嗜铬体所致者外，只产生去甲肾上腺素，不能合成肾上腺素

骨瘤CT表现错误的是（）

A.表现为圆形或分叶状致密骨块，边界清楚光滑

B.密质型骨瘤的密度均匀致密

C.松质型骨瘤边缘有细薄的骨皮质

D.密质型骨瘤内可见均匀致密的骨小梁

E.混合性多为纤维骨瘤

井场内照明灯应采用防爆灯，其电线采用一般的胶皮软线。（）