测验的效度是指测验的可靠性，即多次测验分数的稳定和一致程度。
查看答案
由于人们所属的民族、社会、区域、历史、宗教信仰、道德传统及文化修养的不同，其命名的习惯也很不相同
A. 正确
B. 错误
下列（）可作为A类IP地址。
A. 202.30.152.3
B. 129.74.234.253
C. 10.68.89.1
D. 100.67.60.255
The lockmaster has given you permission to tie off on the lower guide wall to wait your turn to lock through. What should you be most concerned with? （）
A downbound vessel
B. An upbound vessel
Current reaction when the lock chamber is being emptied
D. Current reaction when the lock chamber is being filled
活性炭吸附二硫化碳结析气相色谱法测苯系物，如何活性炭采样管。
微信支付 
支付宝支付