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【单选题】
下列有反应实验的说法中不正确的是( )A.
实验前试管先用热的烧碱溶液洗涤，再用蒸馏水洗涤
B.
向2%的硝酸银溶液中滴入2%的稀氨水液直到生成的沉淀恰好溶解为止。
C.
可采用水浴加热，也可直接加热
D.
可用稀硝酸洗去试管内的
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】关于选择旅游资源观赏位置的叙述,正确的是( )
A.
峡谷、洞、一线天等景观，宜从顶部俯视，方得其妙
B.
瀑布景观，应在适当距离远望，并带有俯瞰之趣
C.
观赏江河湖海应在低临水面的亭台楼阁上
D.
山水组合景观，应乘船沿水路观赏
【单选题】From the passage, we can learn that, in protecting one's personal information, it is advisable ______.
A.
to install antivirus programs on every node in the network
B.
to turn to Internet security companies for help
C.
to hide his IP address by using some sort of software
D.
to come offline from time to time
【单选题】_____, it’s probably not advisable to change the company’s name
A.
on balance
B.
in the balance
【判断题】It’s advisable to avoid eye contact in a conversation with an American businessman as direct eye contact is considered as a sign of challenge.()
A.
正确
B.
错误
【单选题】It's all advisable idea to get out of the dispute,
A.
wise
B.
urgent
C.
useless
D.
proper
【简答题】It's highly advisable ...
【简答题】Scientists have determined it's not advisable to hurry marriage. But what’s the best age to wed? When Avril Lavigne announced she was splitting from her husband, comments from her friends suggested th...
相关题目：
【单选题】_____, it’s probably not advisable to change the company’s name
A.
on balance
B.
in the balance