Which of the following events shows that China has been prosperous? （ ） A.the test flight of the airliner C919 B.the successful launch of Tiangong-2 space lab C.the commissioning of the deep-sea manned submersible Jiaolong D.the launch of the dark matter probe satellite Wukong

Which of the following events shows that China has been prosperous? （ ） A.the test flight of the airliner C919 B.the successful launch of Tiangong-2 space lab C.the commissioning of the deep-sea manned submersible Jiaolong D.the launch of the dark matter probe satellite Wukong

正确答案：ABCD