我国正常婴儿在3个月时的平均体重在5—6千克之间。因此，如果一个3个月的婴儿的体重只有4千克，则说明其间他（她)的体重增长低于平均水平。以下哪项，如果为真，最有助于说明上述论证存在漏洞？
A．婴儿体重增长低于平均水平不意味着发育不正常。
B．上述婴儿在6个月时的体重高于平均水平。
C．上述婴儿出生时的体重低于平均水平。
D．母乳喂养的婴儿体重增长较快。

Teacher: Don’t tell me you’re got a flat tyre again. I wasn’t born yesterday.
Student: _____
A．Alright, I won’t say it.
B．Sorry, I won’t be late next time.
C．You’re right. I’m just joking.
D．Ok, you’ve made your point.

In Guangzhou, capital of South China's Guangdong Province, Guangzhou Baiyun International Airport resumed its international flights to Singapore, Malaysia, Thailand, the Philippines and other Southeast Asian nations and regions early this month, said an airport official yesterday. And the airport's flow of international passengers for July has reached 80 per cent of the figure for the corresponding month of the previous year.
Guangzhou Baiyun International Airport had to cancel some international services to Southeast Asian nations and regions because of the outbreak of SARS beginning in April, the official said. The official predicted his airport's international service would return to normal operation and handle even more international passengers in August.
Currently, the Guangzhou airport is operating 22 international flights to 20 foreign metropolises. And nine foreign airlines have resumed their international flights to the airport.
In July Guangzhou Baiyun International Airport resumed its international service to ______.
A．the whole world
B．only four southeastern nations
C．the Southeast Asian nations
D．all Asian nations

研究者成功地把一种荧光粉粘抹在千岛湖畔出没的蝙蝠的背上。这使得研究者可以较为清楚地观察蝙蝠夜间的活动。因此，这可以大大增进研究者对于蝙蝠捕食方式的了解。为使上述论证成立，以下哪项是必须假设的？
A．千岛湖畔出没的蝙蝠只在夜间捕食。
B．研究者只对蝙蝠的捕食方式而对其他行为方式不感兴趣。
C．在蝙蝠的背部粘抹荧光粉并不会改变蝙蝠的捕食方式。
D．千岛湖的地理环境非常适合研究者作夜间观察。

Jazz is a kind of music that has often been called the only art form. to originate in the United States. The history of【B1】began in the late 1800's. The music grew from a【B2】of influences, including black American music, African rhythms, American band traditions and instruments, and European harmonies and forms. Much of the best jazz is still written and【B3】in the United States. But musicians from many other countries are【B4】major contributions to jazz. Jazz was actually【B5】appreciated as an important art form. in Europe【B6】it gained such recognition in the United States.
The earliest jazz was performed by black Americans who had little or no training in Western music. These musicians drew on a strong musical culture from【B7】life. As jazz grew【B8】popularity, its sound was influenced by【B9】with formal training and classical backgrounds. During its history, jazz has absorbed influences from the folk and classical music of Africa, and other parts of the world. The development of instruments with new and【B10】characteristics has also influenced the sound of jazz.
【B1】
A．art
B．music
C．jazz
D．form

王老师批评小李说：“你怎么上数学课又迟到了。”以下各项都可以从王老师的话中推出或为其所包含，除了：
A．小李上课曾经迟到过。
B．学校有人没有遵守课堂纪律。
C．小李不喜欢数学课。
D．数学课上课的时间是明确的。