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【单选题】
The national flag of UK is called the Union Jack because_____.A.
a man named Jack designed the flag
B.
the country is historically a union of nations
C.
it is named after a king named Jack
D.
it is a symbol of the country
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举一反三
【单选题】Dirt and disease are _________to the best growth of children.
A.
abnormal
B.
adverse
C.
contrary
D.
disadvantage
【简答题】说说方向导数存在与可微、连续之间的关系。
【简答题】Fill in the blanks with the expressions given below. Change the forms where necessary. at risk, be full of, be loaded with, wake up to lead to, switch to, turn... into, according to 1 our record...
【单选题】Dirt and disease are ___________ for the best growth of children.
A.
adverse
B.
diverse
C.
reverse
D.
novel
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