根据TB/T 3193-2008《铁路工程预应力筋用夹片式锚具、夹具和连接器技术条件》中规定,锚具的出厂检验时,对同一规格、同一批原材料、同一种工艺一次投料生产的锚具,每个抽检组批不应超过()。
A.1000件(套)
B.2000件(套)
C.5000件(套)
D.10000件(套)
A.1000件(套)
B.2000件(套)
C.5000件(套)
D.10000件(套)
第2题
试用PR方程计算水的饱和热力学性质。
(a)在T=150℃时的;
(b)在P=1.554MPa时的Tb,(Tb是沸点温度)。
第6题
As it turned out to be a small house party, we______have dressed up so formally.
A.mustn't
B.needn't
C.wouldn't
D.couldn't
第7题
I’d rather you ________ make any comment on the issue for the time being.
A) don’t
B) wouldn’t
C) didn’t
D) shouldn’t
第8题
Many people want to read this book. So you ______ keep it for more than two weeks.
A.can't
B.needn't
C.won't
第9题
—Must I finish my homework now, Mum? —No, you______. You may do it after supper.
A.mustn't
B.may not
C.needn't
第11题
If it ________ too much trouble, I’d love a cup of tea.
A) isn’t
B) wasn’t
C) weren’t
D) hadn’t been