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【简答题】
计算：（-2a） 2 ÷a=______．（-2a）?（ 1 4 a 3 ）=______．
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皮皮学刷刷变学霸
举一反三
【单选题】When the narrator says 'It was a hard struggle for so small a child' (Line 4, Para. 5), she means that
A.
saving her sick sister was too big a task for her as a child.
B.
a child could sometimes do things beyond her imagination.
C.
a child could not distinguish the reality and her fantasy.
D.
her little sister's condition had become too bad to do anything about.
【单选题】互见中,一艘在狭水道中靠右行驶的机动船与另一穿越该狭水道的机动船航向交叉相互驶近并构成碰撞危险则 。
A.
穿越船为让路船
B.
穿越船为直航船
C.
适用交叉相遇局面条款
D.
两船均应采取避让行动
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