皮皮学，免费搜题
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【判断题】
Android最初是由Andy Rubin（安迪•鲁宾）创立的一个手机操作系统。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】It was warmer now, and the snow was beginning to ( )
A.
trudge
B.
thaw
C.
cock
D.
bow
【简答题】(3)在有n个元素的栈中,进栈操作的时间复杂度为 。
【单选题】The snow was now two feet deep, making it difficult, if not impossible, _______ the car out.
A.
getting
B.
get
C.
got
D.
to get
【简答题】在有n个元素的栈中，进栈操作的时间复杂度为。
【单选题】下列属于孕激素作用的是
A.
刺激阴道上皮细胞增生角化
B.
促进子宫平滑肌收缩
C.
促进子宫颈分泌稀薄的粘液
D.
子宫内膜腺体增生、分泌
E.
抑制机体产热，使基础体温降低
【单选题】The country, __with cherry tree flowers, looks as though it is now under a blanket of pink snow.
A.
covering
B.
covered
C.
to cover
D.
covers
【简答题】It _____ (snow) now.
【简答题】It _______(snow) heavily just now and the ground is still covered with white snow.
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