单项选择题

Biotechnology enables us ______.

A．to change the DNA of human beings
B．to produce more milk by increasing the number of cows
C．to increase the functions of various cells and organisms
D．to find new human molecules

<上一题目录下一题>

热门试题

单项选择题

The sentence This question elicits… (Line 4, Para. 2) means______.

A．people have different responses to the question "what is biotechnology"
B．the question "what is biotechnology" has been posed to many people
C．responses to the question "what is biotechnology" should be made on the spot
D．only those who are asked the question "what is biotechnology" can answer it

单项选择题

The human beings began to use biotechnology ______.

A．when they could walk on their feet
B．before they could plant their own crops
C．after they realized that they could raise their own animals
D．as soon as scientists began their studies on biotechnology