The sentence "Rapid growth in the urban population has aided economic development but also created serious problems for major cities" (L.5-7) means the same as

Serious problems have been caused by rapid growth of the urban population in major cities, which on the other hand also brought about economic improvement.

The sentence "Rapid growth in the urban population has aided economic development but also created serious problems for major cities" (L.5-7) means the same as

Rapid increase in the population of bigger cities brought about economical development together with minor problems.

The sentence "Rapid growth in the urban population has aided economic development but also created serious problems for major cities" (L.5-7) means the same as

Rapid growth in the urban population has improved economy in major cities, but on the other hand it caused them serious problems.

According to text I, it can be concluded that

technological progress necessarily means real progress.

According to text I, it can be concluded that

Western and Eastern peoples tend to follow similar technological trend of progress.

According to text I, it can be concluded that

East and West countries can both be threatened by science and technology.

According to text I, it can be concluded that

scientific advances are just a dangerous idol.

According to text I, it can be concluded that

technological progress has always been used for mankind's benefit.

It can be gathered from text I that

the first flint instrument can be considered to be the beginning of mankind future technological advances.

It can be gathered from text I that

men have always been cautious about the use of technological progress.