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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，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H 2 O 2 （3%），再用酒精萃取，可以提取单质碘。
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【单选题】- What should I do now? - You had better ______.
A.
to stay in bed and to keep warm
B.
to stay in bed and keep warm
C.
stay in bed and keep warm
D.
stay in bed and to keep warm
【单选题】He＿＿＿＿＿＿rather stay at home than go to the cinema with you.
A.
should
B.
might
C.
would
D.
had better
【简答题】根据对话选词填空。 had better not , needn’t, had better, would rather, mustn’t JENNY: Nick, we 1______ go to bed. It’s very late. NICK: I know, but I 2______ help Trig than go to bed. He’s tearing up his Eng...
【单选题】You ______ home if you are not willing to go out with us.
A.
had better to stay
B.
might stay as well
C.
might as well stay
D.
had better staying
【简答题】根据图片完成句子。 1 2 3 4 5 1. It is _ _ today. We had better stay at home. 2 .It's _ outside...
【单选题】W: I hurt my leg. I fell down the stairs just now. M: You had better stay in bed, and I will call a doctor. What does the man want the woman to do?
A.
Stay on the stairs
B.
Stay in hospital
C.
Call a doctor
D.
Rest in bed
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