什么是合成反应的最适宜温度？
参考答案：对于合成反应，在一定的催化剂和混合气组成时，出现最大反应速度时的温度，即为最适宜温度。
Which of the following is correct for the underlined word in the sentence? I had some milk and bread for breakfast today.
A．/bred/
B．/bri:d/
C．/bræd/
D．/breəd/
I asked John for _____ ink, but he didn't have _____. [ ]
A. any, some
B. any, any
C. some, any
D. some, some
