题目内容
【题目】为了提高二胡的音调，可采取的措施有 ( )
A、将二胡的弦调紧点 B、将二胡的弦调松些
C、换用一根较粗一点的琴弦 D、用力拨动琴弦
【答案】A
【解析】
试题分析：二胡的音调与弦的振动快慢有关，弦越紧振动越快，弦越松振动越慢，故可以将二胡的弦调紧些，这样就可以提高二胡的音调；
换用较细的琴弦也可以提高琴弦的音调.
【题目】People think that life will probably be very different in 2050. First of all, planes will be very common, so flying will be very cheap. Everyone will have a small car. Fuel(燃料)will be new and clean but very expensive. We will see robots everywhere. Houses will be warm in winter and cool in summer, so they will be very comfortable. We'll use the sunshine to heat our houses. Computers will be very small, so they'll be very light. People will do many things on the Internet.
Water will become one of our most serious problems. In many places, farmers will be in great need of water to grow fruit and vegetables.
In 2050, we will be able to help blind people see again and deaf people hear again. Our life will become better and better.
根据短文内容，完成下面表格(每空一词)。
What will the future be 【1】in 2050？ | |
Planes and cars | ◎Planes will become very 【2】 . People will not spend much money on flying. ◎Everyone will have a small car. Fuel will be new and clean, but very 【3】 ． |
【4】 | ◎They will be comfortable to live in. ◎People won't feel hot or 【5】 at home. ◎The 【6】 will be useful for keeping the houses warm. |
Computers | They will be very small and 【7】 . |
Water | It will become a very serious 【8】 ． |
【9】 | Doctors can make the blind 【10】 again and the deaf hear again. |