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问题 选择题

实验室中测定10000个H2O的相对分子质量，若考虑同位素的存在，已知O有两种同位素16O、18O，H有三种同位素1H、2H、3H，可测得相对分子质量有[ ]

A．1种

B．7种

C．12种

D．1000种

答案

答案：B

单项选择题

患者初病表现为手足不温，身易恶寒，指尖发青，继而发展为面色苍白，唇甲色淡，小腹冷痛，手足冷凉，脉细欲厥。治用（）

A.当归四逆汤

B.通脉四逆汤

C.通脉四逆加猪胆汁汤

D.四逆加人参汤

E.白通汤
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单项选择题

While working on an external project your customer asks you to perform some additional tasks that are not included in the formal contract．You should （）.

A．honor the customer's request as sign of cooperation to ensure future business

B．refuse the request and report the customer to your sponsor

C．acknowledge the request and advise the customer to submit a formal change request

D．convene a meeting of the project team and rewrite the scope statement
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