我国何时成功发射第一颗人造地球卫星?中国第一颗人造卫星发射成功,是继哪四国之后,成为第五个有能用自制的运载火箭,发射本国自行研制人造地球卫星的国家?1975年中国成为继哪两国之后,世界上第三个掌握回收卫星技术的国家?
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下列带缺省值参数的函数说明中,正确的说明是()。
A. intFun(intx,inty=2,intz=3);
B. intFun(intx=1,inty,intz=3);
C. intFun(intx,inty=2,intz);
D. intFun(intx=1,inty,intz=3);
红盾护农行动包括下列哪些工作()
A. 组织引进高新农产品
B. 推广农业订单合同
C. 打击假冒伪劣农资
D. 培育农村经纪人
You created a snapshot of the /data2 filesystem as follows: # fssnap -F ufs -o bs=/data2/snap /data2 But, the system responds with the following error: snapshot error: Invalid backing file path What is the problem? ()
A. The /data filesystem does not exist.
B. This message indicates that the /data2/snap directory does not exist.
C. The name of the Backing Store is incorrect, it should be /dev/fssnap/0
D. This message indicates that you cannot have the backing store file on the same filesystem as the filesystem being snapped.