特大型危险化学品企业的风险抵押金存储不低于人民币（）万元。
A.100
B.150
C.200
D.250
参考答案：C
接入网丢包率参考值，KPI指标集要求（）。
A、≤0.05%
B、≤0.1%
C、≤0.2%
D、≤0.5%
The questionnaire takes ______ ten to fifteen minutes to complete and can be used along with the assessment interview.
A．mainly
B．punctually
C．approximately
D．precisely
