下列叙述中,正确的是( )
A.苯中少量的苯酚可先加适量的浓溴水,使苯酚生成三溴苯酚,再过滤而除去 |
B.常温下苯酚在水中溶解度不大,当温度高于45℃时,则与水互溶 |
C.苯酚的酸性很弱,不能使指示剂变色,但可以和NaHCO3反应放出CO2 |
D.苯酚也可以与硝酸发生硝化反应 |
The children loved their day trip, and they enjoyed the horse ride ______.
A.most | B.more | C.less | D.little |
Progress______ so far very good and we are sure that the work will be finished on time.
A.was | B.had been | C.has been | D.will be |
Charles was alone at home, with_______ looking after him.
A.someone | B.anyone | C.not one | D.no one |
It is often ______ that human beings are naturally equipped to speak.
A.said | B.to say | C.saying | D.being said |
I can’t leave. She told me that I ______ stay here until she comes back.
A.can | B.must | C.will | D.may |