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【简答题】
五、 Idioms are phrases and sentences that do not mean exactly what they say. Even if you know the meaning of each word you see or hear, you may not understand the idiom because you don't understand the culture behind it. For example, if an American boy asks his mother what’s for dinner tomorrow, she may say “I’ll play it by ear”, that means she doesn't have plans for dinner and she will decide later.“Play by ear”used to mean playing music using the sheet music, but now people often use it when they’re not talking about music. There’re many idioms in English. If you learn to use them, your English will be more vivid and colorful. English idioms are more common in spoken English. They can be difficult to remember sometimes. Next time when you hear somebody saying to you, “Give me a hand”, you don’t necessarily stretch out your hand to him/her, but you do need to be helpful. And when the situation is “out of hand”, you usually can do very little to manage all that. What about a “green hand”? It's not about the color of your hand! You’re a green hand when you are very new at your work and don’t have much experience. If you and your partner always “work together hand in glove”, you two definitely work together very well. Can you guess the meanings of some common English idioms to do with parts of your body?
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举一反三
【单选题】下列哪项不是炔雌醇的鉴别试验( )。
A.
与硫酸的呈色反应
B.
与硝酸银的反应
C.
与亚硝基铁氰化钠的反应
D.
红外光谱法
【多选题】炔雌醇的鉴别试验有
A.
与硫酸的呈色反应
B.
与硝酸银的反应
C.
与亚硝基铁氰化钠的反应
D.
与异烟肼的反应
E.
红外光谱法
【判断题】设置的时候Cat类和Pig类可以继承Pet类的属性和方法
A.
正确
B.
错误
【多选题】炔雌醇的鉴别试验方法包括()。
A.
坂口反应
B.
红外光谱法
C.
硫色素反应
D.
与硫酸呈色
E.
与硝酸银的反应
【多选题】炔雌醇的鉴别试验方法包括
A.
红外光谱法
B.
与硫酸呈色
C.
坂口反应
D.
与硝酸银的反应
E.
硫色素反应
【简答题】热备用是备用电源自动投入的方式之一。()
【判断题】热备用是备用电源自动投入的方式之一。
A.
正确
B.
错误
【单选题】pig
A.
pig
B.
big
【判断题】[判断题]热备用是备用电源自动投入的方式之一。()
A.
正确
B.
错误
【判断题】热备用和冷备用是备用电源自动投入的两种方式。()
A.
正确
B.
错误