患者女性，76岁，慢性阻塞性肺疾病Ⅱ级，应用支气管扩张剂控制症状。支气管舒张剂是控制

情景交际

A: Hello. This is Gina here. Is that Helen?

B: Yes, this is Helen          1         .

A: Helen. The happy weekend is coming.           2            ?

B: Yes. I'm not busy at all. I've already finished my homework.

A: What _         3             ?

B: I've no idea. What about you?

A: Let me see. We'd better do something interesting and helpful. Would you like to see some sea animals with us ?

B: Certainly. Where?

A: In the new aquarium.

B: Oh , I remember. I heard of it last week.             4              ?

A : On foot. It's Sunday tomorrow. The traffic must be _          5              , I think.

B: I agree. When and where shall we meet?

A: In front of the school library at eight in the morning.

B: OK. See you tomorrow.

( )仅能对操作者而不能对其他有可能靠近危险区域的人提供保护。

A．控制安全装置

B．自动安全装置

C．双手控制安全装置

D．自动调节安全装置

常量数学应用的局限性是什么？

不能接受的痰标本有

A．唾液

B．24h留的痰

C．拭子

D．肺吸出物

E．肺活检

申请从事危险货物运输经营以外的道路货物运输经营的，应当向（）道路运输管理机构提出申请。

A.省级

B.设区的市级

C.县级