焊接铝及铝合金时,在焊件坡口下面放置垫板的目的是为了防止()。
A.热裂纹
B.冷裂纹
C.气孔
D.塌陷
参考答案:D
虚劳患者,短气自汗,声音低怯,时寒时热,平素易于感冒,舌质淡,脉弱。其证为()
A.肺气虚
B.脾气虚
C.肺阴虚
D.脾阳虚
E.肾气虚
—Would you like _____ to drink?
—Yes, I'd like a cup of coffee.[ ]
A. anything else
B. else something
C. something else
D. else anything