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【多选题】
除移动式的或辅助性的绞车外，提升装置的天轮、滚筒、摩擦轮、导向轮和导向滚等的最小直径与钢丝绳直径之比值，应符合下列哪些要求？（）A.
落地式及有导向轮的塔式摩擦提升装置的摩擦轮及导向轮（包括天轮），不得小于90％，不得小于80％；无导向轮的塔式摩擦提升装置的摩擦轮，不得小于80％，不得小于70％
B.
提升装置的滚筒和围抱角大于90°的天轮，不得小于80％；围抱角小于90°的天轮，不得小于60％
C.
提升绞车和凿井提升绞车的滚筒、架空乘人装置的主导轮和、围抱角大于90°的天轮，不得小于60％；围抱角小于90°的天轮不得小于40％
D.
矸石山绞车的滚筒和导向轮，不得小于50％
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【单选题】Britain's east midlands were once the picture of English countryside, alive with flocks, shepherds, skylarks and buttercups the stuff of fairytales. In 1941 George Marsh left school at the age of 14 t...
A.
cherishes his adolescence memories.
B.
thinks highly of the efficiency of agriculture.
C.
may not have happy memories of past time.
D.
cannot remember his adolescence days.
【单选题】Britain's east midlands were once the picture of English countryside, alive with flocks, shepherds, skylarks and buttercups—the stuff of fairytales. In 1941 George Marsh left school at the age of 14 t...
A.
cherishes his adolescence memories.
B.
thinks highly of the efficiency of agriculture.
C.
may not have happy memories of past time.
D.
cannot remember his adolescence days.
【单选题】听力原文： [24] Independent film producers were once on the fringes of the movie industry, struggling to have their works seen in small theaters and rented halls. The Sundance Festival has helped change al...
A.
They were the highlights of the film festivals.
B.
Their works were popular in small theaters and rented halls.
C.
They were once on the fringes of the movie industry.
D.
Their works were given an important exposure.
【单选题】Inconspicuous Consumption Products and services that were once the preserve of a very wealthy few—from designer handbags to fast cars, bespoke tailoring and domestic servants—are increasingly becoming...
A.
More people have more money.
B.
More people can afford servants.
C.
People are becoming less concerned with what other people buy.
【单选题】Cox-2 inhibitors were once banned from the market because they were found to increase the risk of triggering ______.
A.
colon cancer
B.
stomach problems
C.
heart disease
D.
genetic problems
【单选题】Britain's east midlands were once the picture of English countryside, alive With flocks, shepherds, skylarks and buttercups--the stuff of fairytales. In 1941 George Marsh left school at the age of 14 ...
A.
cherishes his adolescence memories.
B.
thinks highly of the efficiency of agriculture.
C.
may not have happy memories of past time.
D.
cannot remember his adolescence days.
【单选题】Britain's east midlands were once the picture of English countryside, alive with flocks, shepherds, skylarks and buttercups—the stuff of fairytales. In 1941 George Marsh left school at the age of 14 t...
A.
cherishes his adolescence memories.
B.
thinks highly of the efficiency of agriculture.
C.
may not have happy memories of past time.
D.
cannot remember his adolescence days.
【简答题】Besides Stroke Mandeville，surely the s for the disabled were once held in
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