近年来野生的黄花鱼已难觅踪影,造成这一结果的主要原因是( )
A.被天敌捕食
B.生物界的遗传和变异
C.外来物种的入侵
D.掠夺式的开发和利用
答案:D
Solairs工作站重启命令有哪几个?()。
A.init5
B.init6
C.reboot
D.halt
What _______ your uncle that evening?[ ]
A.happened to
B.has happened to
C.was happened
D.happened with