《点型感温火灾探测器》(GB4716-2005)技术标准规定,C型感温探测器的典型应用温度为()
A.55℃
B.80℃
C.84℃
D.100℃
参考答案:A
Our headmaster and secretary of the Party branch ________ going to Beijing this evening. [ ]
A. be
B. are
C. is
D. will be
管饲引起腹泻的原因有()。
A.灌注速度太慢
B.乳糖不耐症
C.营养液温度40℃左右
D.营养液浓度太低
E.管饲不引起腹泻