问题
选择题
.
In _______ summer of 1963 Martin Luther King Jr. gave _______ speech to many black people.
A．不填; a
B．不填; the
C．the; the
D．the; a
答案
答案：D
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.
In _______ summer of 1963 Martin Luther King Jr. gave _______ speech to many black people.
A．不填; a
B．不填; the
C．the; the
D．the; a
答案：D
2C(g)，达到平衡后，只改变反应的一个条件，测得容器中物质的浓度、反应速率随时间的变化如下图所示。下列说法中正确是