受热面管子安装前,焊缝质量应做无损探伤抽查,在制造厂已做100%无损探伤的,则按不同受热面的焊缝数量抽查()。
A.1/1000
B.2/1000
C.5/1000
参考答案:C
Can you tell me ____?
A.how good is his spoken English
B.how well his spoken English is
C.how well he speaks English
D.how good he can speak English
企业物流规划一般围绕降低经营成本、减少投资金额、改进客户服务这三个目标而展开。()