单项选择题

The DNA in the sperm cells can be measured ______.

A．in the same way how the cattle are herded
B．when they pass through a tube one behind the other
C．after they pass through a laser tube
D．when they are scanned by a laser detector all at a time

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热门试题

单项选择题

The first sentence of the passage most probably implies that ______.

A．many Americans are obsessed with the rising temperature in their bathroom
B．more people are overweighed in the United States
C．people are doing more physical exercises with the help of scales
D．youngsters become taller and healthier thanks to more activities

单项选择题

Of tackling obesity in the poor world, we can learn from the passage that ______.

A．the matter is so complex as to go beyond our capacity
B．no matter what we do, the prospect will always be bleak
C．it is starvation, the real threat, that needs to be solved
D．we should take immediate actions before it becomes incurable