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【多选题】
是压力容器的重要组成部件，关于容器的，下面叙述中（ ）是正确的。A.
从的受力状况来说，半球形最好，平板最差，椭圆形和蝶形次之；因此，同等条件下，平板所需的厚度最大；
B.
从制造的难易程度来看，平板便于制造，半球形制造加工比较困难；
C.
由于其受力状态较好，又便于制造，在中低压容器中，大量采用了椭圆形封头，尤其是标准椭圆形封头；
D.
对于直径不大的高压或超高压容器，则多采用平板，此时便于制造是平板突出的优点；
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举一反三
【多选题】. 氮平衡的说法正确的有(
A.
每日摄人氮量小于排出氮量是负氮平衡
B.
正氮平衡多见于健康的孕妇
C.
氮平衡实质上是表示每日氨基酸进出人体的量
D.
总氮平衡常见于成人
【多选题】有关氮平衡，正确的说法是
A.
氮平衡时，蛋白质的摄入量大于排出量
B.
氮平衡可用于评价人体的蛋白质营养状况
C.
负氮平衡常见于老年人和妊娠妇女
D.
健康成年人最好出现正氮平衡
E.
负氮平衡可见于烧伤病人
【单选题】At 28 February 20X6, a company's allowance for receivables amounted to £18,600. In the year to 28 February 20X7 it was decided to write off £3,000 of debts as irrecoverable and to carry forward an all...
A.
£5,400
B.
£24,000
C.
£18,600
D.
£8,400
【多选题】有关氮平衡，正确的说法是()
A.
氮平衡时，蛋白质的摄入量大于排除量
B.
氮平衡可用于评价人体的蛋白质营养状况
C.
负氮平衡常见于老年人和妊娠妇女
D.
健康成年人最好出现正氮平衡
E.
负氮平衡可见于烧伤病人
【多选题】下列有关氮平衡说法正确的是：
A.
氮平衡指摄入的氮与尿中排出氮的对比关系
B.
氮平衡指 体内总的含氮量与每日排出氮量的对比关系
C.
氮平衡指 消化吸收的氮与未吸收的氮的对比关系
D.
氮平衡指 摄入氮与排出氮的对比关系
E.
氮正平衡，氮负平衡均见于正常成人
F.
总氮平衡常见于儿童
G.
反映体内蛋白质代谢概况
【单选题】At 1 January 20X1, there was an allowance for receivables of $3,000. During the year, $1,000 of debts were written off as irrecoverable, and $800 of debts previously written off were recovered. At 31 ...
A.
$200 debit
B.
$1,800 debit
C.
$2,200 debit
D.
$1,800 credit
【单选题】At the beginning of the year, the allowance for receivables was $850. At the year-end, the allowance required was $1,000. During the year $500 of debts were written off, which includes $100 previously...
A.
$1,500
B.
$1,000
C.
$650
D.
$550
【简答题】Irrecoverable debts are $5,000. Trade receivables at the year end are $120,000. If an allowance forreceivables equivalent to 5% of trade receivables is required, what is the entry for irrecoverable de...
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