A：科研与生产的直接结合
B：世界市场的进一步发展
C：帝国主义对外扩张的要求
D：国家垄断资本主义的发展
阅读下面这首宋诗，然后回答问题。
虚堂 寇准
虚堂寂寂草虫鸣，欹枕难忘是旧情。
斜月半轩疏树影，夜深风露更凄清。
寇准（961-1023），北宋政治家、诗人。因刚直不阿，两次罢相。
In April, the weather in some places in Shanxi was really changeable. People still remember they have _______ four seasons in a week.
从方框中选词并用其适当形式填空
wear sing hear watch help
（1）Tony likes music and he likes ____.
（2）Be quiet! Can you ____ someone is singing a song?
（3）Tom’s aunt always ____ T- shirts.
（4）The family like ____ TV at home together.
（5）Li Lei always ____ others.
leave my go visit be
OH﹣
NO3﹣
CO32﹣
Cl﹣
SO42﹣
H+
﹣
溶、挥
溶
Na+
Ca2+
微
不
Ba2+
Cu2+
