液体的初始温度越高,其燃烧速度()。
A、越快
B、越慢
C、与初始温度无关
D、不确定
参考答案:A
The boy looks stupid, but _____ he is smart. [ ]
A. in a fact
B. as a fact
C. in a matter of fact
D. as a matter of fact
局部麻醉药物普鲁卡因中加入肾上腺素的浓度是()
A.1/200
B.1/2000
C.1/20000
D.1/200000
E.1/2000000