饰面型防火涂料可使可燃基材的耐燃时间延长()。
A.5~10min
B.5~20min
C.10~30min
D.15~40min
E.20~40min
参考答案:C
Everybody _____ stressed out sometimes. It' s natural (自然地). [ ]
A. got
B. gets
C. is getting
D. get to
1岁男孩,反复耳朵流脓3个月,曾患支气管肺炎4次。体检:发育营养差,双肺中细湿啰音,肝肋下3cm,脾肋下1cm。WBC15.5×10/L,中性粒细胞0.72,淋巴细胞0.28;血清IgG1.5g/L,IgM0.2g/L,IgA<0.05g/L。其诊断可能为()
A.慢性肉芽肿病
B.X-连锁无丙种球蛋白血症
C.X-连锁高IgM血症
D.选择性IgA缺陷病
E.联合免疫缺陷病