人重组肿瘤坏死因子与PEG结合后，抑瘤效果明显大于原药，试叙述其原因。
According to the researchers behind the study, all of the following will happen EXCEPT
A. a decrease in temperature.
B. an increase of rain.
C. the mitigation of global warming.
D. the reduction of soil contamination.
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.
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
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