利用道路桥梁跨越河流的燃气管道,其管道的输送压力()。
A、不应大于0.4MPa
B、不应小于0.4MPa
C、不应大于0.5MPa
D、不应小于0.5MPa
参考答案:A
用 come about, happen, take place, break out, occur 的正确形式填空
①I was out of town at the time, so I don't know exactly how it ________.
②The meeting _________ at 8:00 as planned.
③It ________ to rain that morning.
④A fire ________ in the hotel last night.
⑤It suddenly _________ to me that I ha left my key in the office.
短期贷款,系指贷款期限()的贷款
A.6个月以内
B.1年以内(含1年)
C.1年以内(不含1年)
D.3年以内