FOCKE350小盒包装机商标纸小胶缸上胶轮拆卸时，拧掉小胶缸盖子的（）颗M6的锁紧螺钉。
A.4
B.6
C.2
D.1
参考答案：B
______ he can hardly read is ____________ he is slow in mind.
A．what; that
B．That; what
C．What; because
D．That; because
脑瘤（）
A.脑电图可以帮助确诊
B.脑电图可以帮助病变定位
C.两者均是
D.两者均否
