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问题 多项选择题

下列哪些会造成涂膜颗粒、起粒、表面粗糙？（）

A、涂料变质，基料析出、颜料凝聚等

B、施工时，双组份涂料中固化剂加入量不够

C、涂装场所不洁净

D、喷涂时喷枪口径小、压力大

答案

参考答案：A, C, D

单项选择题

When you open a file or run a program in a computer, a window appears on the desktop of your computer. The (67) of the window indicates which program you are currently working in arid its color will become blue if a window is active. When you click on The (68) , the window disappears and appears as a button on the taskbar. Clicking on a button in (69) will invoke a specific command.

A．control menu

B．control bar

C．title menu

D．status bar
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单项选择题

有出现穿孔趋势的溃疡病患者，最好不选用

A．碳酸氢钠

B．哌仑西平

C．奥美拉唑

D．西咪替丁

E．胃舒平
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