给水、排水、供热及采暖管道阀门的严密性试验压力为公称压力的( )倍。
A.1.1B.1.2C.1.3D.1.5
参考答案:A
— Can you complete the task tomorrow?
— Sorry, it is _________, but I will try my best.
A.beyond my power
B.in my power
C.in power
D.out of my force
在书写查询准则时,日期型数据应该使用适当的分隔符括起来,正确的分隔符是______。
A.* B.% C.& D.#