单项选择题

Lip-reading is difficult in that ______.

A．it needs special training and a lot of practice
B．the lip reader has to focus on the other person constantly
C．the lip reader has to give tip normal life styles
D．lip-reading disturbs the work of a heating aid

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热门试题

单项选择题

Cutting carbon dioxide emission by 60% will ______.

A．be reached when low-income countries agree to reach an agreement
B．cause a collapse of the world economy
C．reduce in a large amount the content of CO₂in the atmosphere
D．help realize a stabled world economy

单项选择题

It can be inferred that since the Kyoto conference, we find ______.

A．global warming problem is closely related to economy development
B．global warming has produced various economy problems around the world
C．different countries have different views on the effect of global warming
D．global warming has greatly affected the worldwide economy development