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【多选题】
LD 50 数值越小,表示外源化学物的毒性越( )。A.
大
B.
小
C.
强
D.
弱
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举一反三
【简答题】填空题:墙体按其构造方式不同有____ 、 ____ 和____ 等。
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【单选题】Tonight we are going to have a look at ________ developments in Biology.
A.
newly
B.
nearby
C.
recent
D.
later
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【单选题】My mother and I are going shopping. We are going to ...shoes.
A.
think about
B.
wait for
C.
worry about
D.
look at
【单选题】—You look very ______ this afternoon. Why? —Because we are going to spend the evening at Lily’s house.
A.
happy
B.
happily
C.
happiness
【判断题】We are going to look after my niece and nephew this month while their parents go away for a short break.
A.
正确
B.
错误
【简答题】墙体按其构造方式不同有_______、_______和组合墙等
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