隔爆型电源装置由（）构成。
A.隔爆箱
B.消氢装置
C.电池
参考答案：A, B, C
Can you believe? To raise an adopted dog, a young Australian even stayed single, ______ possible
relationships with female students on campus! [ ]
A. turning out
B. turning down
C. turning away
D. turning in
假设检验时，当t＞0.05则P＜0.05，结论为
A．差别有极显著性
B．差别无显著性
C．有显著性差别
D．无显著性差别
E．差别无极显著性
