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【单选题】
一群在实验室里研究老鼠体内的钙的新陈代谢的科学家发现，去除老鼠的甲状旁腺可以导致老鼠血液中的钙的水平比正常水平低得多。这个发现使科学家们假设甲状旁腺的功能是调节血液中的钙的水平。当钙的水平降到正常范围之下，它就会升高钙的水平。在进一步的试验中，科学家们不但去除了老鼠的甲状旁腺，而且去除了它们的肾上腺，他们出乎意料地发现老鼠血液中钙的水平的下降比去除甲状旁腺时慢得多。下面哪一项如果正确，能与科学家们的假设相一致地解释那个出入意料的发现?( )A.
肾上腺的作用是降低血液中钙的水平。
B.
肾上腺与甲状旁腺在调节血液中钙的水平时作用是一样的。
C.
甲状旁腺的缺乏能促使肾上腺增加血液中的钙的水平。
D.
如果只是把老鼠的肾上腺去除，而没有把其他的腺移去，这只老鼠的血液中的钙的水平将会维持不变。
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【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
【单选题】At the start of the year Joe had an allowance of $700 against receivables. During the year $450 of this amount went bad and $150 was received; the balance remained unpaid at the year end. At the year ...
A.
$450
B.
$90
C.
$300
D.
$690
【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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