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【简答题】
维生素的作用是调节体内进行的化学反应，以保持身体健康．维生素A有助于保护视力，缺乏维生素A，会引起 _________ ．缺乏维生素 _________ （填“A”、“B”、“C”和“D”）会引起坏血病，防止缺乏该种维生素，吃 _________ ．维生素 _________ 有助于骨骼和牙齿的生长发育．（填“A”、“B”、“C”和“D”）
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举一反三
【单选题】No one likes to eat with a dirty knife, fork, or spoon. It is important to completely wash all utensils before using them. Clean utensils won’t transmit germs and bacteria. They also are more pleasant...
A.
No one likes to eat with a dirty knife, fork, or spoon.
B.
It is important to completely wash all utensils before using them.
C.
Clean utensils won’t transmit germs and bacteria.
D.
They also are more pleasant to eat with.
【简答题】What is the difference between Chinese people and British people when they are using spoon
【单选题】What kind of spoon is often used to eat desserts?
A.
Soup spoon
B.
Tea spoon
C.
Dessert spoon
D.
Salad spoon
【单选题】________ he is ill, ________he goes to school.
A.
Although; but
B.
/; /
C.
Although; /
【单选题】将0.360g某非电解质溶于30.0g水中，溶液凝固点为-0.124℃。则该非电解质的摩尔质量(g·mol -1 )约为( )。
A.
50.3；
B.
178；
C.
180；
D.
1250。
【单选题】___________he is poor,________he is happy.
A.
Although;/
B.
Although; but
C.
But; although
D.
/; /
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