问题
选择题
The reason ____the little actress has been such a success is ____she is both clever and hard-working.
A．why, why
B．why, that
C．that, because
D．for, because
答案
答案：B
题目分析：句意：那个小女演员如此成功的原因就是她不仅聪明而且勤奋。固定结构the reason why…is that… “…的原因是…。故B正确
pC（g）达到平衡后，保持温度不变，将气体体积缩小到原来的1/2，当达到新平衡时，C的浓度为原来的1.9倍。下列说法中正确的是[ ]