延髓背外侧综合征闭塞的动脉为
A．小脑后下动脉B．基底动脉主干C．小脑前下动脉D．大脑后动脉E．丘脑膝状体动脉
参考答案：A
Her sister has become a lawyer,_____ she wanted to be. [ ]
A. who
B. that
C. what
D. which
可以用来有效防治半翅目害虫烟粉虱的寄生性天敌有（）。
A、稻螟赤眼蜂
B、菜绒盘茧蜂
C、暗黑赤眼蜂
D、丽蚜小蜂
