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问题 填空题

用于定容的玻璃仪器如容量瓶、移液管、吸量管和滴定管等，在使用前都必须（）。使用时，此类仪器内表面应（），当放出液体时，不能有（）。

答案

参考答案：经体积校准；保证清洁；任何液膜的破裂

单项选择题

In 2005, Wilson, Inc. entered into a long-term construction contract with the Gordon School District to construct an elementary school for $ 20 million. The cost to complete the contract has been reliably estimated at $15 million. During 2005, costs of $ 7.5 million were incurred under the contract. A total of $ 9 million in advance billings were made and $ 5 million of those billings were received in cash. If Wilson used the percentage-of-completion method to account for this contract, Wilson, Inc.’s balance sheet as of December 31, 2005, will show a balance of:（）

A. $ 4 million in the Net Construction-in-Progress asset account.

B. $ 4 million in the Net Advance Billings liability account.

C. $ 1 million in the Net Construction-in-Progress asset account.
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单项选择题

不要式合同成立的地点一般是（）。

A．权利一方的所在地

B．义务一方的所在地

C．要约人收到承诺的地点

D．承诺人发出承诺的地点
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