因事故大量吸入氯乙烯后,主要毒作用表现是()
A.中枢神经系统的麻醉作用
B.肢端溶骨症
C.过敏性支气管哮喘
D.聚合物烟雾热
E.呼吸道刺激作用
参考答案:A
Jack opened the door, there_____ he had never seen before.
A.a woman did stand
B.a woman stood
C.did a woman stand
D.stood a woman
在窗体上画一个名称为Text1的文本框,并编写如下程序: Private Sub Form_Load()ShowTextl.Text=""Textl.Set Focus End Sub Private Sub Form_MouseUp(Button As Inateger,Shift As Integer,X As Single,Y As Single)Frint"程序设计" End Sub Private Sub Textl_KeyDown(KeyCode As InteSer,Shin As Integer)Print"VisualBasic"; End Sub 程序运行后,如果按A键,然后单击窗体,则在窗体上显示的内容是______。
A.Visual Bask
B.程序设计
C.A程序设计
D.ViualBasic程序设计