API函数wx.showModal（Objectobject)的参数属性（)表示取消按钮的文字，最多4个字符。

A.wx.showToast(Objectobject)

B.wx.showModal(Objectobject)

C.wx.showLoading(Objectobject)

D.wx.hideToast(Objectobject)

A.wx.showModal(Objectobject)

B.wx.showLoading(Objectobject)

C.wx.hideToast(Objectobject)

D.wx.hideLoading(Objectobject)

A.title

B.content

C.showCancel

D.cancelText

在以A(0，1)，B(1，0)，O(0，0)为顶点的三角形内任取一点P，直线AP与OB交于Q，求点Q的横坐标Z的分布函数F_Z(z)．

A.wx.showTabBar(Objectobject)

B.wx.hideTabBar(Objectobject)

C.wx.setTabBarBadge(Objectobject)

D.wx.removeTabBarBadge(Objectobject)

A.wx.startCompass(Objectobject)

B.wx.onCompassChange(functioncallback)

C.wx.startAccelerometer(Objectobject)

D.wx.startGyroscope(Objectobject)

A.wx.saveFile(Objectobject)

B.wx.getSavedFileList(Objectobject)

C.wx.getSavedFileInfo(Objectobject)

D.wx.removeSavedFile(Objectobject)

A.wx.saveFile(Objectobject)

B.wx.getSavedFileList(Objectobject)

C.wx.getSavedFileInfo(Objectobject)

D.wx.removeSavedFile(Objectobject)

A.wx.getStorageInfo(Objectobject)

B.Objectwx.getStorageInfoSync()

C.wx.removeStorage(Objectobject)

D.wx.removeStorageSync(stringkey)