题目内容

我国的标准等级分为国家标准、行业标准和企业标准三级。( )

A. 对
B. 错

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当观察一未知药用植物时,某人根据其有唇形花冠,草本,判断它为玄参科植物,请问: (1)其判断依据充分吗说明理由。 (2)根据所观察到的特征,这种药用植物还可能是哪些科植物 (3)比较这些科的主要特征(包括化学成分)。

国际标准是世界各国进行贸易的基本准则和基本要求,我国《标准化法》规定:“国家必须采用国际标准。”( )

A. 对
B. 错

西红花和草红花分别来源于鸢尾科和菊科,请说明此二科花的结构的主要特征。

Complete these sentences with some or any. Then match them to the questions in Exercise 2 like this: a I’m afraid not. But there are some near the cafeteria. [ 1 ] b No, there isn’t ______ parking near the Centre.[ ] c Yes, there are ______ sporting events. There’s a tennis tournament on Saturday and a swimming competition on Sunday.[ ] d Yes, there are ______ excellent restaurants nearby.[ ] e No, there aren’t ______ shopsnear the Centre. [ ] f Yes, thereare ______ inexpensive hotels near the Centre. For example, the Park Hotel isn’t too expensive. [ ]

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