What do some experts worry about the Barbados nut according to the passage？
A. Its ability to grow well and absorb carbon.
B. The high cost and low production.
C. The high temperature in the surroundings.
D. Its ability to create biodiesel.
查看答案
城轨交通通信主干网是一种基于()的传输系统()
A. 双线线
B. 光纤
C. 同轴电缆
D. 电线
Which of the following is the legislative body of Britain？
A. British monarchy.
British government.
C. The Supreme Court.
D. British parliament.
Which of the following statements cannot explain "fantastic value for the local people"？
A. The soil quality around the carbon farming can be improved.
B. The rural area can be developed as the carbon markets boom.
C. There will be more agriculture.
D. The yield of carbon farming is surprising.
已知A气体含量为80此时，其峰高为100mm，现进一等体积待测样品，得到峰高为70mm，使用单点校正法可知该样品中A气体的体积百分含量是
A. 70%
B. 80%
C. 56%
D. 41.2%
E. 30%
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