执行以下程序，理论上输出的结果应最接近整数（ ）
from multiprocessing import Pool import time def task(): for i in range(3): time.sleep(1) if __name__ == '__main__': start = time.time() p = Pool(2) for i in range(5): p.apply_async(task) p.close() p.join() end = time.time() print(end-start)
