下列关于紫杉醇的描述，错误的是（） A.广谱、天然抗肿瘤药 B.长期应用可产生抗药性

I went hiking to a mountain with my friend last summer. It was a good trip in the beginning and something unexpected happened halfway. One of my friends suddenly felt a terrible pain in his stomach and he couldn’t move any far. Nobody knew how to deal it. One girl tried to call her mum over her mobile phone, but there is no signal in the mountain area. Lucky we had brought a tent with us. We put it up and let him to rest in it. After taken some pills, he drank some water and ate some food. After a while, I felt much better and we walked on. We all enjoyed us on the top of the mountain.

25. The watch, which I_________only last week, is out of order again.

A．had repaired

B．had repair

C．had it repaired

D．had it to repair

①将浓氨水逐滴滴入装有生石灰的烧瓶中，可以制取氨气。

②取1mL 20%蔗糖溶液，加入适量稀硫酸，水浴加热约5min后，再加入少量新制的Cu（OH）₂，加热，可检验蔗糖是否发生水解。

③配制一定物质的量浓度的NaCl溶液时，定容后摇匀，发现液面又低于刻度线，此时无须再加入蒸馏水。

④用小刀切取少量金属钠做实验，切剩的钠要立即放入原试剂瓶。

⑤在含I^—的溶液中加入适量稀硫酸与H₂O₂（3%），再用酒精萃取，可以提取单质碘。

陈列药品应按（）分类整齐摆放类别标签应放置准确、字迹清楚。

在机体修理中应确保结构（）、（）、使用寿命及装配要求，并尽可能控制（）的增加。