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【单选题】
A母液浓缩20倍,B母液浓缩50倍,利用它们配制2L原液,则A、B两种母液依次取A.
80ml和40ml
B.
100ml和40ml
C.
40ml和100ml
D.
40ml和80ml
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举一反三
【单选题】In the sunny morning, some English people usually take a raincoat or an umbrella with them because ______.
A.
their friends ask them to do so
B.
it often rains in England
C.
they are going to sell them
【单选题】In the sunny morning some English people usually take a raincoat or an umbrella with them because ________.
A.
their friends ask them to do so
B.
it often rains in England
C.
they are going to sell them
D.
they are their favourite things
【单选题】We all had fun in the supermarket a sunny morning.
A.
shop; on
B.
shopping; in
C.
shopping; on
D.
shopping; /
【简答题】When you go to England, you will see that some English people usually take an umbrella(伞) or a raincoat (雨衣) with them in the sunny morning.
【单选题】When you go to England, you will see that some English people usually take an umbrellaĩೢĪor a raincoat with them in the sunny morning, but you should not ______ at them.
A.
laugh
B.
smile
【简答题】总体剪切侧移是由梁、柱 变形所导致的框架侧移A. 弯曲
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