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【单选题】
关于地球外部圈层的叙述，正确的是( )A.
地球的外部圈层包括岩石圈、水圈、生物圈、大气圈
B.
生物圈是地球表层生物及其生存环境的总称，包括大气圈、水圈和岩石圈
C.
人类生活的地球表层是开放的、均一的系统
D.
生物圈是大气圈、水圈和岩石圈相互渗透、相互影响的结果
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【简答题】小雨同学家买了一台新的某品牌电磁炉，她想测一下这台电磁炉的实际功率，做了如下研究：用它把2kg温度为25℃的水，加热到75℃，用时5min。[c 水 =4.2×10 3 J/（kg?℃）]求： （1）加热过程中，水吸收的热量是多少？ （2）如果加热过程中有70%的热量被水吸收，则此电磁炉的实际功率是多少？ （3）测试完成后，小雨观察到此电磁炉的铭牌标有“220V 2200W”字样，发现这与第（2...
【单选题】Which of the following is a sales contract governed by CISG?
A.
Sales of primary commodities.
B.
Sales of investment securities.
C.
Sales of goods bought for personal, family, or household use.
D.
Sales of electricity.
【简答题】一台标有“2200W,220V”的电炉,求:(1)电炉正常工作时的电流=?以及电炉的电阻=?
【简答题】Car sales fell sharply following a peak in June.
【单选题】Which of the following correctly describe the entry in the sales account for a sale for a sales tax registered trader?
A.
Credited with the total of sales made, including sales tax
B.
Credited with the total of sales made, excluding sales tax
C.
Debited with the total of sales made, including sales tax
D.
Debited with the total of sales made, excluding sales tax
【单选题】查看材料
A.
Sales assistants promoting high margin goods．
B.
Sales assistants following customers around．
C.
Customers competing for good bargains．
D.
Customers losing all sense of time．
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