实现准同步的方法有？
参考答案：
1）码速调整法
2）水库法
The young soldier really doesn't know ______ to stop the baby from crying. [ ]
A. what to do
B. which to do
C. when to do
D. where to do
硅谷有一个以（）为基础的工业体系。
A.产业网络
B.信息网络
C.地区网络
D.互联网
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