GB18583-2001中测定苯采用的定量方法是(),测定TDI时采用的定量方法是()。
参考答案:外标法;内标法
This May as Putin has to step down after his 8-year presidency, Medvedev(梅德维杰夫) will _____ as the youngest ever president of modern Russia.
A.look over
B.take over
C.come over
D.run over