下图表示两种动物呼吸作用耗氧量随环境温度变化的关系图解,下列有关叙述中不正确的是

题型:选择题

问题:

下图表示两种动物呼吸作用耗氧量随环境温度变化的关系图解,下列有关叙述中不正确的是

[ ]

A.甲应为是变温动物,乙为恒温动物

B.甲、乙变化的原因都是温度影响酶活性

C.甲曲线表示的动物20℃代谢比10℃时强

D.乙曲线表示的动物在0℃时产热和散热保持平衡

考点:生物的体温及其调节有氧呼吸
题型:选择题

依照《中华人民共和国个人所得税法》,纳税义务人的确定原则是______。

A.属人原则
B.属地原则
C.属人或属地原则
D.属人和属地原则

题型:选择题

“An old village woman in her seventies from Zhenjiang Province rented a small house in Shanghai and let visitors to the World Expo live there for free while she slept on a little couch. Her kindness moved(感动) countless people.” Chinese Premier Wen Jiabao said so at the Expo 2010 Shanghai China on October 31 when it ended.

It is a true story. The heroine of it is Ying Miaofang, an old woman from a village of Zhuji City in Shaoxing of Zhejiang Province. “I rented a house in Shanghai and received more than 330 Expo visitors during three months’ time. My house was never empty during that period.” Ying told reporters. She also said it was worth helping so many people to visit the Shanghai World Expo and she was praised by Premier Wen.

In the late of last May. Ying Miaofang paid 1,800yuan per month to rent a small house near Changning Road in Shanghai, and spent more money on a new air conditioner, a refrigerator, a TV set and other things. She published her phone number in the newspaper and opened the house for Expo visitors for free on June 23.

Besides providing a free living place., Ying got up very early every morning to buy food, cook breakfast, clean rooms and wash clothes for those guests. Many of her guests wanted to pay some money to her when they left, but she refused. In order to support the Shanghai Would Expo, Ying spent about 20 thousand yuan in all, which could not be regarded as a little money for a woman from a village.

小题1:The underlined work “countless” has the same meaning as _____

A.enough

B.many

C.few

D.countable小题2:The house cost Ying Miaofang _______ yuan during three months.

A.330

B.1,800

C.5,400

D.20,000小题3:Ying Miaofang is a(n)______________.

A.villager

B.worker

C.officer

D.volunteer小题4:The visitors living in the house which Ying Miaofang rented in Shanghai___________.

A.washed clothes for her

B.helped clean the rooms

C.cooked themselves

D.didn’t need to pay for it小题5:Ying Miaofang was very happy to ____________.

A.have a good time with her friends

B.help the visitors during the World Expo

C.make money for her family

D.have a good harvest in autum

题型:选择题

读“世界人口垂直分布状况图”、“世界人口纬度分布状况图”、 “世界人口分布图”,回答下列问题。(7分)

(1)图中A、B、_______、_______ (填字母)四地,是世界上人口稠密的地区。它们的共同特点是:①处于______纬度地区,气候温和;②海陆位置方面多为        地带;③地形方面为        地区。

(2)其余字母代表的地区则人口稀少,其中F处人口稀少的原因是                            

(3)由此可以看出,世界人口主要分布在                                               地带。

题型:选择题

在电风扇、电烙铁、电磁起重机中,利用电流磁效应工作的是_________;利用电流热效应工作的是__________;利用“通电导体在磁场中要受到力的作用原理”工作的是______________。

题型:选择题

根尖周囊肿最重要的临床诊断依据是()

A.牙髓无活力

B.根尖周围透射区白线围绕

C.根管内有浅黄透明囊液

D.囊液中见到胆固醇结晶

E.以上都不是

更多题库